JP2002219968A - Inattentive driving and dozing driving alarm - Google Patents

Abstract

PROBLEM TO BE SOLVED: To appropriately determine an inattentive driving and a dozing driving. SOLUTION: This device detects an inattentive state and a dozing state of a driver, times the continuing time of the inattentive state and the dozing state of the driver, and calculates an inter-vehicle time L/V from a preceding vehicle based on a car speed detecting value and an inter-vehicle distance detecting value. An allowable time T1 corresponding to the inter-vehicle time calculating value L/V is searched and set from a table of the allowable time T1 relative to the inter-vehicle time L/V which is so set beforehand that the allowable time T1 becomes the maximum value Tp in a prescribed inter-vehicle time L/V and, when the continuing time of the inattentive state and the dozing state exceeds the allowable time set value T1, it is determined that the driver drives inattentively or dozes at the wheel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for detecting a driver's inattentive driving and drowsy driving and for issuing an alarm.

[0002]

2. Description of the Related Art There is known a device which detects a driver's inattentive driving and drowsiness driving and issues an alarm (for example, Japanese Patent Application Laid-Open No. 08-2608).
No. 07617, JP-A-07-057172). This type of device detects the vehicle speed and the inter-vehicle distance to the preceding vehicle as the traveling state of the vehicle, changes the allowable time of the inattentive state or the dozing state according to the traveling state, and sets the inattentive state or the dozing state longer than the allowable time. The driver is warned when a condition is detected.

[0003]

However, in the conventional inattentive driving and drowsy driving alarm, the allowable time is increased as the vehicle speed is lower and the inter-vehicle distance is longer. When traveling a long distance, the possibility of collision with the preceding vehicle is small, but the oncoming vehicle turns right, the overtaking vehicle cuts in, or the pedestrian crosses the preceding vehicle. In some cases, even at low vehicle speeds and long inter-vehicle distances, there is no room to extend the allowable time for inattentive driving or dozing, so that it is possible to make more accurate judgments of inattentive driving and dozing driving. It is desirable to do.

An object of the present invention is to appropriately determine inattentive driving and drowsy driving.

[0005]

(1) The invention according to claim 1 is a driver state detecting means for detecting a driver's inattentive state and dozing state, and measures the duration of the driver's inattentive state and dozing state. Time measuring means, a vehicle speed detecting means for detecting a vehicle speed, an inter-vehicle distance detecting means for detecting an inter-vehicle distance to a preceding vehicle, and an inter-vehicle time between the preceding vehicle based on the detected vehicle speed and the inter-vehicle distance detected value. An inter-vehicle time calculating means for calculating the inter-vehicle time and a permissible time corresponding to the inter-vehicle time calculated value are retrieved and set from a table of allowable times for the inter-vehicle time set in advance so that the permissible time becomes a maximum value at a predetermined inter-vehicle time. Allowable time setting means, if the duration of the inattentive state or dozing state exceeds the allowable time set value,
A determination means for determining that the driver is driving aside is driving aside or drowsy, thereby achieving the above object. (2) The inattentive driving and drowsy driving warning device according to claim 2 includes an alarm unit that gives an alarm to the driver when the judging unit determines that the driver is looking aside or drowsy driving. (3) The inattentive driving and drowsy driving warning device according to claim 3 includes a correction unit that shortens the maximum value of the allowable time of the table or the inter-vehicle time at which the allowable time becomes the maximum as the detected vehicle speed value increases. (4) The alarm device for inattentive driving and drowsiness driving according to claim 4, further comprising a correction unit that shortens the maximum value of the allowable time of the table or the inter-vehicle time at which the allowable time becomes the maximum as the inter-vehicle distance detection value increases. . (5) The inattentive driving and drowsy driving alarm device according to claim 5, wherein the acceleration detecting means detects the acceleration of the vehicle, and the maximum value of the allowable time of the table or the inter-vehicle time at which the allowable time becomes the maximum is detected by the acceleration detection. Correction means for shortening as the value increases. (6) The inattentive driving and drowsy driving warning device according to claim 6, wherein the steering angle detecting means for detecting a steering angle of the vehicle, and the maximum value of the allowable time of the table or the inter-vehicle time at which the allowable time becomes the maximum value, Correction means for shortening as the steering angle detection value increases. (7) The inattentive driving and drowsy driving warning device according to claim 7, wherein the driving environment detecting means for detecting the driving environment of the vehicle, and the maximum value of the allowable time of the table or the inter-vehicle time at which the allowable time is the maximum value, Correction means for correcting in accordance with the driving environment detection result. (8) The inattentive driving and drowsy driving warning device of claim 8 detects the traffic congestion state by the driving environment detecting means,
The correction means shortens the maximum value of the allowable time in the table or the inter-vehicle time at which the allowable time becomes the maximum as the traffic congestion situation becomes more crowded. (9) The inattentive driving and drowsy driving alarm according to claim 9 detects day or night distinction by the driving environment detecting means,
The correction means shortens the maximum value of the permissible time in the table or the inter-vehicle time at which the permissible time becomes the maximum value as the night becomes closer. (10) The inattentive driving and drowsy driving alarm of claim 10 detects the weather by the driving environment detecting means,
The correction means shortens the maximum value of the permissible time in the table or the inter-vehicle time at which the permissible time becomes the maximum as the weather becomes worse. (11) The inattentive driving and drowsy driving alarm device according to claim 11, wherein the driving environment detecting means detects a road type, and the correcting means detects the maximum value of the allowable time of the table or the distance between vehicles having the maximum allowable time. Make the time shorter when driving on a general road in an urban area. (12) The inattentive driving and drowsy driving alarm device according to claim 12, wherein the driver information detecting means for detecting information about the driver, and the maximum value of the allowable time of the table or the inter-vehicle time at which the allowable time is the maximum value, Correction means for correcting according to the detection result of the driver information. (13) The inattentive driving and drowsy driving warning device according to claim 13, wherein the driver information detecting means detects the driving history of the driver, and the correcting means sets the maximum allowable time or the maximum allowable time of the table. The inter-vehicle time, which is a value, is shortened as the driving history is longer. (14) The inattentive driving and drowsy driving warning device according to claim 14, wherein the driver information detecting means detects the tendency of the driver to look aside and the correcting means sets the maximum allowable time or the maximum allowable time of the table. The inter-vehicle time range that is a value is corrected according to the detection result of the inattentiveness tendency.

[0006]

(1) According to the first aspect of the present invention, when traveling at high speed or when the inter-vehicle distance is short, the allowable time is short because the inter-vehicle time is short. It can be determined that the vehicle is driving and a detection delay of an abnormal approach to the preceding vehicle can be avoided. On the other hand, when driving at a low speed or when the distance between vehicles is long, the allowable time is shortened because the time between vehicles is long, and obstacles that are determined to be inattentive driving or dozing driving early and enter between the preceding vehicle You can avoid delays in finding things. That is, inattentive driving and drowsy driving can be determined more appropriately. (2) According to the invention of claim 2, in addition to the effect of claim 1, it is possible to give a warning to the driver at an appropriate timing based on an appropriate determination result of inattentive driving or dozing driving. (3) According to the invention of claim 3, the permissible time is shorter as the vehicle speed is faster even at the same inter-vehicle time. Therefore, the faster the vehicle speed, the earlier it is possible to determine that the driver is looking aside or drowsy, and the vehicle speed of the own vehicle is reduced. Even if the driver or pedestrian of another vehicle mistakes the judgment of the own vehicle speed when the vehicle is fast, it is possible to avoid a delay in finding another vehicle or pedestrian entering the vehicle ahead. (4) According to the invention of claim 4, the permissible time becomes shorter as the inter-vehicle distance is longer even at the same inter-vehicle time. Even if the driver or pedestrian of another vehicle makes a mistake in determining the distance to the own vehicle when the vehicle is long, it is possible to avoid a delay in finding another vehicle or pedestrian coming in between with the preceding vehicle. (5) According to the invention of claim 5, since the driver or pedestrian of another vehicle cannot judge the acceleration of the own vehicle,
The higher the acceleration of the vehicle, the higher the degree of contact. However, the higher the acceleration, the shorter the permissible time. Therefore, the higher the acceleration, the earlier it is possible to determine that the driver is looking aside or drowsy. Even if the driver or pedestrian of the present vehicle mistakenly judges the acceleration of the own vehicle, it is possible to avoid a delay in finding another vehicle or pedestrian entering between the vehicle and the preceding vehicle. (6) According to the invention of claim 6, the traveling direction must be monitored in a more exploratory manner as the steering angle increases, but the driver or pedestrian of another vehicle in the steered direction approaches the own vehicle. Although the contact degree is high because it is difficult to be recognized, the allowable time is shortened as the steering angle is large, and therefore it is possible to determine that the driver is looking aside or drowsy as soon as the steering angle is large, It is possible to avoid delay in finding pedestrians. (7) According to the invention of claim 7, it is possible to appropriately determine the inattentive driving or the drowsy driving regardless of how the driving environment changes, and to perform the inattentive driving or dozing at an appropriate timing according to the driving environment. A warning can be given for driving. (8) According to the invention of claim 8, the degree of contact increases as the traffic congestion increases, but the allowable time decreases as the traffic congestion increases. Therefore, it is possible to determine the inattentive driving or dozing driving earlier as the traffic congestion increases. Yes, no matter how the traffic congestion changes, it is possible to appropriately determine whether to look aside or drowsy, and to warn against driving aside or drowsiness at an appropriate timing according to the degree of danger due to the traffic congestion. Can be. (9) According to the ninth aspect of the invention, the visibility and visibility are reduced at night and the degree of contact is increased, but the permissible time is shortened at night and, therefore, the driver is inattentive driving or falling asleep earlier at night. Driving can be determined, and inattentive driving or drowsy driving can be properly determined regardless of day or night, and an alarm is given to inattentive driving or dozing driving at an appropriate timing according to the degree of danger of day or night. can do. (10) According to the invention of claim 10, as the weather becomes worse, the visibility and the visibility become lower, and the degree of contact becomes higher.
The permissible time becomes shorter as the weather worsens, so that it is possible to judge inattentive driving or dozing driving earlier as the weather worsens, and to appropriately judge inattentive driving or dozing driving regardless of how the weather changes It is possible to warn of inattentive driving or dozing driving at an appropriate timing according to the weather. (11) According to the eleventh aspect of the present invention, the degree of contact is higher when traveling on a general road in an urban area than on a highway or an arterial road, but the allowable time is shorter when traveling on an ordinary road in an urban area. It is possible to judge inattentive driving or dozing driving as soon as possible, and it is possible to appropriately determine inattentive driving or dozing driving regardless of the road type, and to perform inattentive driving or dozing driving at appropriate timing according to the road type. Alarm. (12) According to the twelfth aspect of the present invention, the allowable time is set according to the individual difference between the drivers. Therefore, it is possible to appropriately perform the inattentive driving or the dozing driving in consideration of the individual difference between the drivers. It is possible to warn the inattentive driving or the drowsy driving at an appropriate timing in consideration of the individual difference between the drivers. (13) According to the invention of claim 13, the shorter the driving history, the higher the contact degree. However, the shorter the driving history, the shorter the allowable time. Therefore, it is possible to early determine the inattentive driving or the drowsy driving, It is possible to appropriately determine the inattentive driving or the dozing driving in consideration of the driving history of the driver, and to warn the inattentive driving or the dozing driving at an appropriate timing according to the driving history. (14) According to the fourteenth aspect of the present invention, it is possible to appropriately perform the inattentive driving or the drowsy driving in consideration of the driver's inattentive driving tendency, and to perform the inattentive driving at an appropriate timing according to the driver's inattentive driving tendency. Alternatively, a warning can be issued for drowsy driving.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS << First Embodiment of the Invention >> A first embodiment in which an allowable time for an inattentive state and a dozing state is set based on the inter-vehicle time with a preceding vehicle will be described. I do.

FIG. 1 shows a configuration of the first embodiment, and FIG. 2 shows a state in which each component is installed in a vehicle. The vehicle speed sensor 1 detects the traveling speed V of the own vehicle. The inter-vehicle distance sensor 2 detects the presence or absence of a preceding vehicle and the inter-vehicle distance L. The driver state detection device 3 detects a driver's inattentive state or dozing state. For example, an image of the driver's face is taken with a CCD camera,
In addition to detecting the driver's face direction by image processing and detecting the inattentive state, the open / closed state of the driver's eyes is detected to detect a dozing state. The controller 4 is a CPU 4a,
The control unit includes a ROM 4b, a RAM 4c, a timer 4d, and the like, and executes a control program described later to perform an alarm process for inattentive driving and dozing driving. The timer 4d measures the duration T0 of the inattentive state or the dozing state detected by the driving state detecting device 3. The alarm device 5 generates sound, vibration, odor, etc., to call attention to the driver in front of the driver, and to wake up from dozing.

In the configuration of the first embodiment, the driver condition detecting device 3 is a driver condition detecting device, the timer 4d is a time measuring device, the vehicle speed sensor 4 is a vehicle speed detecting device,
The inter-vehicle distance sensor 2 constitutes an inter-vehicle distance detection unit, and the controller 4 constitutes an allowable time setting unit and a determination unit.

FIG. 3 is a flowchart showing an alarm control program. The operation of the first embodiment will be described with reference to this flowchart. The controller 4 repeatedly executes the alarm control program. First, step 10
In step 1, the vehicle speed V is detected by the vehicle speed sensor 1, and in the following step 102, the preceding vehicle is detected by the following distance sensor 2, and the following distance L to the preceding vehicle is detected. In step 103, the inter-vehicle time L / V is calculated based on the vehicle speed V and the inter-vehicle distance L.

In step 104, the driver's inattentive state and dozing state are detected by the driver state detecting device 3.
In step 105, it is confirmed whether an inattentive state or a dozing state has been detected. If detected, the process proceeds to step 106, and if not detected, the process returns to step 101.

When the driver's inattentive state or dozing state is detected, at step 106, the duration T0 of the inattentive state or dozing state is detected. Next, step 107
From the table of the inattentive / sleeping time T1 for the inter-vehicle time L / V that is set in advance and stored in the ROM 4b (see FIG. 4, details will be described later), the allowable time corresponding to the inter-vehicle time L / V calculated in step 103 is determined. The time T1 is read.
Then, in step 108, the duration T0 of the inattentive state or the dozing state is compared with the permissible time T1, and if the duration T0 of the inattentive state or the dozing state is equal to or longer than the permissible time T1, the driver performs the inattentive driving or the dozing driving. The process proceeds to step 109 and the alarm device 5 is operated.

FIG. 4 shows a map of the inattentive / sleeping time T1 with respect to the inter-vehicle time L / V. Actually, this map is converted into a numerical value, and is stored in the ROM 4b as a data table.
Is stored. According to the applicant's measurement of inattentive driving conditions when driving on a main road, a long inattentive state occurs during normal driving because the inter-vehicle time L / V is not too long, not too short, and the inter-vehicle time L / V is not too short. It has been confirmed that it occurs within the range. It is considered that this is because when the inter-vehicle time is short, the preceding vehicle ahead is monitored, and when the inter-vehicle time is long, a forward obstacle other than the preceding vehicle is searched for.

The table shown in FIG. 4 is set based on the above-mentioned experimental results by the applicant. The allowable time T1 may be set continuously with respect to the inter-vehicle time L / V as shown in (a), or may be set as shown in (b).
May be set stepwise. Or (c)
May be set according to the experimental results as shown in FIG. In addition,
Although the table shown in FIG. 4 shows a setting example in which the allowable time has a maximum value Tp in a predetermined inter-vehicle time, the allowable time may be set to be the maximum value Tp in a predetermined inter-vehicle time range. In any of the tables, the allowable time is set to the maximum value Tp in a predetermined inter-vehicle time or a predetermined inter-vehicle time range. Is allowed, and as the inter-vehicle time becomes shorter or as the inter-vehicle time becomes longer, the allowable time in the inattentive state or the dozing state is shortened.

As described above, in the first embodiment, the inattentive state and the drowsy state are set based on the inter-vehicle time so that the allowable time of the inattentive state and the dozing state is maximized in the predetermined inter-vehicle time or the predetermined inter-vehicle time range. The allowable time of the state is set, and an alarm is issued when the duration of the inattentive state or the dozing state exceeds the allowable time. As a result, when driving at high speed or when the inter-vehicle distance is short, the allowable time is shortened because the inter-vehicle time is short, so that an early warning is issued to avoid a delay in finding an abnormal approach to the preceding vehicle. it can. On the other hand, when driving at low speeds or when the distance between vehicles is long, the allowable time becomes short because the time between vehicles is long,
Therefore, it is possible to avoid a delay in finding an obstacle that is determined as inattentive driving or dozing driving as soon as possible and that enters the vehicle ahead. That is, it is possible to appropriately determine the inattentive driving and the drowsy driving, and it is possible to issue an alarm for the inattentive driving and the dozing driving at a more appropriate timing.

<< Second Embodiment of the Invention >> Inter-vehicle time L /
A second embodiment in which the allowable time T1 of the inattentive state and the dozing state set based on V is corrected according to the vehicle speed V will be described. Note that the configuration of the second embodiment is the same as the configuration shown in FIGS. 1 and 2, and a description thereof will be omitted.

FIG. 5 is a flowchart showing an alarm control program according to the second embodiment. The operation of the second embodiment will be described with reference to this flowchart. The controller 4 repeatedly executes the alarm control program. The processing of steps 201 to 207 is performed in step 1 of FIG.
This is the same as the processing of 01 to 107, and the description is omitted.

The allowable time T1 for the current inter-vehicle time L / V is obtained from the table of the allowable inter-vehicle time shown in FIG.
Is read, in step 208, the allowable time T1 is corrected according to the vehicle speed V. This correction will be described later. After correcting the allowable time T1 according to the vehicle speed V, step 20 is executed.
In step 9, the duration T0 of the inattentive state or the dozing state is compared with the corrected allowable time T1. If the duration T0 of the inattentive state or the dozing state is equal to or longer than the allowable time T1, the driver performs the inattentive driving or the dozing operation. The process proceeds to step 210, and the alarm device 5 is operated.

FIG. 6 shows an example of correction of the allowable time T1 between the inattentive state and the dozing state according to the vehicle speed V. Drivers and pedestrians tend to have larger speed recognition errors as the vehicle speed increases, and larger distance errors as the inter-vehicle distance increases. Therefore, as shown in (a), the maximum allowable value Tp of the inattentive state and the dozing state is reduced as the vehicle speed V increases. With this correction, the relationship between the inter-vehicle time L / V and the allowable time T1 becomes
(c), even if the driver or pedestrian of another vehicle mistakenly determines the approach speed of the own vehicle, the faster the vehicle speed, the earlier it can be determined that the driver is looking aside or drowsy, It is possible to issue an alarm for inattentive driving and drowsy driving at an appropriate timing according to the degree of danger.

As shown in FIG. 6B, the inter-vehicle time at which the allowable time becomes the maximum value Tp may be corrected according to the vehicle speed V. When the correction 1 shown in (a) and the correction 2 shown in (b) are performed, the relationship between the inter-vehicle time L / V and the allowable time T1 is (d)
The maximum allowable value Tp of the inattentive state and the drowsy state becomes shorter as the vehicle speed V becomes higher, and the inter-vehicle time L / V at which the allowable time T1 becomes the maximum value Tp also becomes shorter. Thereby, even if the driver or pedestrian of another vehicle makes a mistake in determining the approach speed of the own vehicle, it can be determined that the driver is looking aside or drowsy as soon as the vehicle speed is higher, and at an appropriate timing according to the vehicle speed. An alarm for inattentive driving and dozing driving can be issued.

In the above-described second embodiment, an example is shown in which the maximum value Tp of the allowable time between the inattentive state and the dozing state is corrected according to the vehicle speed V, but the inattentive state and the dozing state are corrected according to the inter-vehicle distance L. The maximum value Tp of the allowable time may be corrected. That is, since the driver tends to misunderstand the distance as the inter-vehicle distance is longer, the correction is made such that the longer the inter-vehicle distance L, the shorter the allowable time maximum value Tp. As a result, the longer the inter-vehicle distance L is, the earlier it is possible to determine that the driver is looking aside or drowsy, and a warning can be issued for the inattentive driving and the drowsy driving at an appropriate timing according to the degree of risk based on the inter-vehicle distance.

<< Third Embodiment of the Invention >> Inter-vehicle time L /
A third embodiment in which the allowable time T1 of the inattentive state and the dozing state set based on V is corrected according to the acceleration A will be described.

FIG. 7 shows the configuration of the third embodiment. The same components as those shown in FIG. 1 are denoted by the same reference numerals, and the description will focus on the differences. The acceleration sensor 6 detects the acceleration A of the vehicle. Note that the acceleration A may be calculated by calculating a change per unit time of the vehicle speed V detected by the vehicle speed sensor 1 without providing the acceleration sensor 6. Note that, in the third embodiment, the acceleration sensor 6
This is the same as the first embodiment described above, except that constitutes an acceleration detecting means.

FIG. 8 is a flowchart showing an alarm control program. The operation of the third embodiment will be described with reference to this flowchart. The controller 4 repeatedly executes the alarm control program. Step 301-
The processing in step 303 is the same as the processing in steps 101 to 103 in FIG. In step 304 after calculating the inter-vehicle time L / V, the acceleration A of the vehicle is detected by the acceleration sensor 6. The processing of subsequent steps 305 to 308 is the same as the processing of steps 104 to 107 in FIG.

Based on the table of allowable time for inter-vehicle time shown in FIG. 4, the allowable time T1 for the current inter-vehicle time L / V
Is read, in step 309, the allowable time T1 is corrected according to the acceleration A. This correction will be described later.
After the allowable time T1 is corrected in accordance with the acceleration A, the duration T0 of the inattentive state or the dozing state is compared with the corrected allowable time T1 at step 310, and the duration T0 of the inattentive state or the dozing state is equal to or more than the allowable time T1. In the case of, it is determined that the driver is performing inattentive driving or falling asleep, and the process proceeds to step 311 to activate the alarm device 5.

FIG. 9 shows an example of correction of the allowable time T1 in the inattentive state and the dozing state according to the acceleration A. According to an experiment conducted by the applicant, looking aside while the vehicle is accelerating, the vehicle tends to approach the preceding vehicle, but even if the driver looks aside for a relatively long time while the vehicle is decelerating, the vehicle approaches the preceding vehicle. The result that it was difficult to be obtained was obtained. Further, since it is difficult for the driver or pedestrian of another vehicle to judge whether the vehicle is accelerating or decelerating, the degree of contact is relatively low even if another vehicle or pedestrian enters between the own vehicle and the preceding vehicle during deceleration. However, the degree of contact increases during acceleration.

Therefore, in the third embodiment, it is determined whether the own vehicle is accelerating, running at a constant speed, or decelerating based on the acceleration A detected by the acceleration sensor 6, and FIG.
The maximum value Tp of the allowable time in the inattentive state and the dozing state is corrected according to the acceleration / deceleration of the vehicle as shown in FIG. In other words, while the acceleration A takes a positive value, the correction is performed so that the maximum allowable value Tp becomes shorter as the acceleration A increases, based on the constant speed running with the acceleration A being zero. In addition, during the deceleration in which the acceleration A takes a negative value, the correction is performed such that the allowable time maximum value Tp increases as the acceleration A decreases, that is, as the deceleration increases. With this correction, the following time L / V
The relationship between the time and the allowable time T1 is as shown in (c). The greater the acceleration, the shorter the inattentive state or drowsy state is determined to be inattentive driving or drowsy driving, and too close to the preceding vehicle during acceleration is determined. In addition to this, even if the driver or pedestrian of another vehicle mistakenly judges the acceleration of the own vehicle when the acceleration is large, it is possible to avoid delay in finding the other vehicle or pedestrian entering the vehicle ahead. it can. Conversely, the larger the deceleration, the longer the inattentive state and dozing state are allowed.

As shown in FIG. 9B, the inter-vehicle time at which the allowable time becomes the maximum value Tp may be corrected according to the acceleration A. When the correction 1 shown in (a) and the correction 2 shown in (b) are performed, the relationship between the inter-vehicle time L / V and the allowable time T1 is (d)
And the maximum allowable value Tp of the inattentive state and the dozing state decreases as the acceleration increases, and the inter-vehicle time L / V at which the allowable time T1 reaches the maximum value Tp also decreases.
As the acceleration increases, the maximum allowable value Tp of the inattentive state and the dozing state decreases, and the allowable time T1 increases to the maximum value T.
Since the inter-vehicle time L / V, which is p, also becomes shorter, it is determined that the driver is looking aside or drowsy as soon as the acceleration is larger, so that the vehicle can be prevented from approaching the preceding vehicle too much during acceleration. Even if the driver or the pedestrian of the car mistakenly judges the acceleration of the own vehicle, it is possible to avoid a delay in finding another vehicle or a pedestrian entering between the vehicle and the preceding vehicle.

<< Fourth Embodiment of the Invention >> The inter-vehicle time L /
A fourth embodiment will be described in which the allowable time T1 of the inattentive state and the dozing state set based on V is corrected according to the steering angle θ.

FIG. 10 shows the configuration of the fourth embodiment.
The same components as those shown in FIG. 1 are denoted by the same reference numerals, and the description will focus on the differences. Steering angle sensor 7
Detects the steering angle θ of the vehicle. The fourth embodiment is the same as the first embodiment except that the operation angle sensor 7 constitutes a steering angle detecting unit.

FIG. 11 is a flowchart showing an alarm control program. The operation of the fourth embodiment will be described with reference to this flowchart. The controller 4 repeatedly executes the alarm control program. Step 401
Steps 403 to 403 are the same as the steps 101 to 103 in FIG. In step 404 after calculating the inter-vehicle time L / V, the steering angle θ of the vehicle is detected by the steering angle sensor 7. The processing of the following steps 405 to 408 is the same as the processing of steps 104 to 107 in FIG.
Description is omitted.

The permissible time T1 for the current inter-vehicle time L / V is obtained from the table of the permissible time for the inter-vehicle time shown in FIG.
Is read, in step 409, the allowable time T1 is corrected according to the steering angle θ. This correction will be described later.
After the allowable time T1 is corrected in accordance with the steering angle θ, in step 410, the duration T0 of the inattentive state or the dozing state is compared with the corrected allowable time T1, and the duration T0 of the inattentive state or the dozing state is determined as the allowable time T1. In the above case, it is determined that the driver is looking aside or drowsy, and the process proceeds to step 411 to activate the alarm device 5.

FIG. 12 shows a correction example of the allowable time T1 in the inattentive state and the dozing state according to the steering angle θ. Normally, when turning on a curved road, turning left or right at an intersection, changing lanes, changing course, etc., steer the vehicle.At this time, the situation in the steered direction must be monitored carefully. Sometimes the situation is difficult to see. In addition, since it is difficult for the driver or pedestrian of another vehicle in the steering direction to recognize the approach of the vehicle,
During steering, the degree of contact is higher than during normal running.

Therefore, in the fourth embodiment, FIG.
As shown in FIG. 2A, the maximum value Tp of the allowable time in the inattentive state and the dozing state is corrected according to the steering angle θ detected by the steering angle sensor 7. That is, the correction is performed such that the larger the steering angle θ is, the shorter the allowable time maximum value Tp is. By this correction, the relationship between the inter-vehicle time L / V and the allowable time T1 becomes (c)
As the steering angle θ is larger, it is determined that the driver is inattentive driving or drowsy driving even in a short time inattentive state or drowsy state, and for inattentive driving and dozing driving at appropriate timing according to the degree of steering. An alarm can be issued.

As shown in FIG. 12B, the inter-vehicle time at which the allowable time reaches the maximum value Tp may be corrected according to the steering angle θ. When the correction 1 shown in (a) and the correction 2 shown in (b) are performed, the relationship between the inter-vehicle time L / V and the allowable time T1 is
(d), the larger the steering angle θ, the shorter the allowable time maximum value Tp in the inattentive state and the dozing state, and the shorter the inter-vehicle time L / V at which the allowable time T1 becomes the maximum value Tp, the steering angle becomes larger. The larger the θ, the sooner it is possible to determine that the driver is looking aside or drowsy, and to perform an alarm for the drowsy driving and the drowsy driving at an appropriate timing according to the degree of turning.

<< Fifth Embodiment of the Invention >> Inter-vehicle time L /
A fifth embodiment in which the allowable time T1 of the inattentive state and the dozing state set based on V is corrected according to the traffic congestion state will be described.

FIG. 13 shows the configuration of the fifth embodiment.
The same components as those shown in FIG. 1 are denoted by the same reference numerals, and the description will focus on the differences. The traveling environment detection device 8 receives VICS information provided from media such as a radio beacon, an optical beacon, and an FM multiplex direction, and detects a traffic jam condition. The fourth embodiment is the same as the first embodiment described above, except that the traveling environment detection device 8 constitutes a traveling environment detection unit.

FIG. 14 is a flowchart showing an alarm control program. The operation of the fifth embodiment will be described with reference to this flowchart. The controller 4 repeatedly executes the alarm control program. Step 501
The processing of steps 503 to 503 is the same as the processing of steps 101 to 103 in FIG. In step 504 after calculating the inter-vehicle time L / V, the traffic environment is detected by the traveling environment detecting device 8. The subsequent processing in steps 505 to 508 is the same as the processing in steps 104 to 107 in FIG.

From the table of allowable time for inter-vehicle time shown in FIG. 4, the allowable time T1 for the current inter-vehicle time L / V
Is read, in step 509, the allowable time T1 is corrected according to the traffic congestion situation. This correction will be described later.
After correcting the permissible time T1 according to the traffic congestion state, in step 510, the duration T0 of the inattentive state or the dozing state is compared with the corrected permissible time T1, and the duration T0 of the inattentive state or the dozing state is equal to or more than the permissible time T1. In the case of, it is determined that the driver is performing inattentive driving or drowsy driving, and the process proceeds to step 511 to activate the alarm device 5.

FIG. 15 shows an example of the correction of the allowable time T1 in the inattentive state and the dozing state according to the traffic congestion state. During traffic jams, leading vehicles and other vehicles often behave unexpectedly,
Even at low speeds, you must be well ahead of the scene. Therefore, in this embodiment, the maximum value Tp of the allowable time in the inattentive state and the dozing state is corrected according to the traffic congestion state as shown in FIG. That is, the correction is performed such that the maximum allowable time Tp becomes shorter as the traffic becomes more crowded. With this correction, the relationship between the inter-vehicle time L / V and the permissible time T1 becomes the relationship shown in (c), and the more intense the traffic congestion, the shorter the inattentive state or dozing state, it is determined to be inattentive driving or dozing driving.
It is possible to issue an alarm for inattentive driving and drowsy driving at an appropriate timing according to the degree of traffic congestion.

As shown in FIG. 15B, the inter-vehicle time at which the allowable time becomes the maximum value Tp may be corrected according to the traffic congestion situation. When the correction 1 shown in (a) and the correction 2 shown in (b) are performed, the relationship between the inter-vehicle time L / V and the allowable time T1 is
The relationship shown in (d) is obtained, and as the traffic congestion becomes more severe, that is, as the traffic becomes more congested, the maximum allowable time Tp of the inattentive state and the dozing state is obtained
And the inter-vehicle time L / V at which the allowable time T1 reaches the maximum value Tp is also shortened. Therefore, it is possible to determine that the driver is looking aside or drowsy as soon as the traffic is severe, and to look aside at an appropriate timing according to the degree of the traffic congestion. A warning can be issued for driving and dozing.

<< Sixth Embodiment of the Invention >> The inter-vehicle time L /
A sixth embodiment will be described in which the allowable time T1 of the inattentive state and the dozing state set based on V is corrected according to whether the vehicle is running day or night.

The configuration of the sixth embodiment is similar to the configuration shown in FIG. The traveling environment detection device 8 includes a light receiving sensor on the upper surface of the instrument panel, and detects the illuminance (lux) outside the vehicle using the light receiving sensor. The controller 4 determines day, dusk, or night based on the illuminance outside the vehicle detected by the traveling environment detection device 8. The light-receiving sensor is used in a lamp control device that automatically turns on and off the headlights and small lamps of the vehicle according to the illuminance outside the vehicle, but it is manually turned on and off in vehicles that are not equipped with such a lamp control device. Day, dusk, and night may be determined based on the turning on / off state of the head lamp and the small lamp. That is, when both the headlamp and the small lamp are turned off, it may be determined that the vehicle is running during daytime, when only the small lamp is lit, it is determined that the vehicle is traveling at dusk, and when the headlamp is lit, it is determined that the vehicle is running at night.

FIG. 16 is a flowchart showing an alarm control program. The operation of the sixth embodiment will be described with reference to this flowchart. The controller 4 repeatedly executes the alarm control program. Step 601
The processing of steps 603 is the same as the processing of steps 101 to 103 in FIG. At step 604 after calculating the inter-vehicle time L / V, day, dusk, and night are determined based on the illuminance outside the vehicle detected by the traveling environment detection device 8. The processing of subsequent steps 605 to 608 is performed in step 10 of FIG.
This is the same as the processing in steps 4 to 107, and the description is omitted.

From the permissible time table for inter-vehicle time shown in FIG. 4, the permissible time T1 for the current inter-vehicle time L / V
Is read, in step 609, the allowable time T1 is corrected according to day or night. This correction will be described later.
After correcting the allowable time T1 according to day or night, the duration T0 of the inattentive state or dozing state is compared with the corrected allowable time T1 at step 610, and the duration T0 of the inattentive state or dozing state is equal to or more than the allowable time T1. In the case of, it is determined that the driver is performing inattentive driving or falling asleep, and the process proceeds to step 611 to activate the alarm device 5.

FIG. 17 shows a correction example of the allowable time T1 in the inattentive state and the dozing state according to day and night. At nighttime, unlike daytime, visibility and visibility are reduced, so that a driver or a pedestrian of another vehicle often mistakenly recognizes a relative distance or approach speed to the own vehicle. Therefore, you must monitor ahead more carefully at night than during the day. In this embodiment, the maximum value Tp of the allowable time in the inattentive state and the dozing state is corrected according to day and night as shown in FIG. That is, the correction is performed such that the darker the outside of the vehicle at night, the shorter the allowable time maximum value Tp becomes. By this correction, the following time L / V and the allowable time T
The relationship with 1 is the relationship shown in (c), and the darker the night, the shorter the inattentive state or dozing state is determined to be inattentive driving or dozing driving, and the visibility and the visibility by day and night are determined. It is possible to give an alarm for inattentive driving and drowsy driving at an appropriate timing according to the degree of sex decline.

As shown in FIG. 17B, the inter-vehicle time at which the allowable time reaches the maximum value Tp may be corrected according to day or night. When the correction 1 shown in (a) and the correction 2 shown in (b) are performed, the relationship between the inter-vehicle time L / V and the allowable time T1 is
(d), the darker at night, the shorter the permissible time maximum value Tp in the inattentive state and the dozing state, and the shorter the inter-vehicle time L / V at which the permissible time T1 becomes the maximum value Tp, the shorter the night, As the vehicle becomes darker, it can be determined that the driver is inattentive driving or dozing driving earlier, and an alarm for inattentive driving and dozing driving can be issued at an appropriate timing according to the degree of visibility and visibility reduction depending on day and night.

<< Seventh Embodiment of the Invention >> The headway time L /
A seventh embodiment in which the allowable time T1 of the inattentive state and the dozing state set based on V is corrected according to the weather will be described.

The configuration of the seventh embodiment is similar to the configuration shown in FIG. The traveling environment detecting device 8 has a raindrop sensor on the upper surface of the engine hood, and detects the amount and pressure of raindrops and snow falling on the raindrop sensor surface. The controller 4 determines rainy weather or snowfall based on the amount and pressure of raindrops detected by the traveling environment detection device 8. When the wiper is operating, it may be determined that it is rainy or snowy.
The driving environment detecting device 8 also determines that fog is occurring when the fog lamp is turned on. Note that the type of weather and the method of detecting the weather are not limited to this embodiment.

FIG. 18 is a flowchart showing an alarm control program. The operation of the seventh embodiment will be described with reference to this flowchart. The controller 4 repeatedly executes the alarm control program. Step 701
Steps 703 to 703 are the same as steps 101 to 103 in FIG. In step 704 after the calculation of the inter-vehicle time L / V, the weather is detected by the traveling environment detecting device 8. The processing in subsequent steps 705 to 708 is the same as the processing in steps 104 to 107 in FIG. 3, and a description thereof will be omitted.

The permissible time T1 for the current inter-vehicle time L / V is obtained from the table of the permissible time for the inter-vehicle time shown in FIG.
Is read, in step 709, the allowable time T1 is corrected according to the weather. This correction will be described later. After the allowable time T1 is corrected according to the weather, the duration T0 of the inattentive state or the dozing state is compared with the corrected allowable time T1 at step 710, and the duration T0 of the inattentive state or the dozing state is equal to or more than the allowable time T1. When it is determined that the driver is driving aside,
Proceed to 1 to activate the alarm device 5.

FIG. 19 shows an example of correction of the allowable time T1 between the inattentive state and the dozing state according to the weather. In rainy weather, snowfall, and fog, visibility and visibility are reduced unlike sunny or cloudy weather, so drivers and pedestrians of other vehicles can not recognize their own vehicles, relative distance and approach speed Are often misidentified. Therefore, it is necessary to monitor the front more carefully in bad weather than in clear or cloudy weather. In this embodiment, the maximum value Tp of the permissible time in the inattentive state and the dozing state is corrected according to the weather as shown in FIG. That is, the correction is performed such that the maximum allowable value Tp becomes shorter as the weather becomes worse. By this correction, the following time L / V and the allowable time T1
And the relationship shown in (c), the worse the weather, the shorter the inattentive state or drowsy state is determined to be inattentive driving or drowsy driving even for a short period of time. An alarm for inattentive driving and drowsy driving can be issued at an appropriate timing according to the degree.

As shown in FIG. 19B, the inter-vehicle time at which the allowable time reaches the maximum value Tp may be corrected according to the weather. When the correction 1 shown in (a) and the correction 2 shown in (b) are performed, the relationship between the inter-vehicle time L / V and the permissible time T1 becomes the relationship shown in (d). Since the maximum permissible time Tp of the state is shortened and the inter-vehicle time L / V at which the permissible time T1 reaches the maximum value Tp is also shortened, it can be determined that the driver is looking aside or drowsy as soon as the weather worsens, and is visually recognized due to the deterioration of the weather. It is possible to give an alarm for inattentive driving and drowsiness driving at appropriate timing according to the degree of danger of lowering visibility and visibility.

<< Eighth Embodiment of the Invention >> Inter-vehicle time L /
An eighth embodiment will be described in which the allowable time T1 of the inattentive state and the dozing state set based on V is corrected according to the road type.

The configuration of the eighth embodiment is the same as the configuration shown in FIG. The traveling environment detection device 8 includes a navigation device, and detects the current position of the own vehicle by satellite navigation and autonomous navigation, and also detects the type of road on which the vehicle is traveling. The road information may be received from a radio beacon or an optical beacon installed on the road to recognize the road type.

FIG. 20 is a flowchart showing the alarm control program. The operation of the eighth embodiment will be described with reference to this flowchart. The controller 4 repeatedly executes the alarm control program. Step 801
Steps 803 to 803 are the same as the steps 101 to 103 in FIG. In step 804 after calculating the inter-vehicle time L / V, the road type is detected by the traveling environment detecting device 8. The subsequent processing in steps 805 to 808 is the same as the processing in steps 104 to 107 in FIG.

The allowable time T1 for the current inter-vehicle time L / V is obtained from the table of the allowable inter-vehicle time shown in FIG.
Is read, in step 809, the allowable time T1 is corrected according to the road type. This correction will be described later.
After the allowable time T1 is corrected according to the road type, the duration T0 of the inattentive state or the dozing state is compared with the corrected allowable time T1 at step 810, and the duration T0 of the inattentive state or the dozing state is equal to or more than the allowable time T1. In the case of, it is determined that the driver is performing inattentive driving or drowsy driving, and the process proceeds to step 811 to activate the alarm device 5.

FIG. 21 shows an example of correction of the allowable time T1 in the inattentive state and the dozing state according to the type of road. The possibility of an obstacle such as an intersecting vehicle, a right-turning vehicle, or a pedestrian in front of the own vehicle is higher on a general road in an urban area than on a main road or an expressway. Therefore, general roads in urban areas must be monitored more carefully ahead than expressways and highways. In this embodiment, the maximum value Tp of the allowable time in the inattentive state and the dozing state is corrected according to the road type as shown in FIG. In other words, when traveling on a general road in an urban area, the maximum allowable time Tp is higher than that of an expressway or a main road.
Is corrected to be shorter. With this correction, the relationship between the inter-vehicle time L / V and the permissible time T1 becomes the relationship shown in (c). In general, an inattentive driving or drowsy driving on an ordinary road in an urban area is shorter than on an expressway or a main road. It is determined that the vehicle is dozing, and an alarm for inattentive driving and drowsy driving can be issued at an optimal timing according to the type of road.

In addition to correcting the maximum allowable time Tp in the inattentive state and the dozing state according to the road type, the vehicle speed V
By correcting the allowable time maximum value Tp according to the above, it is possible to give an alarm to the driver even in an inattentive state or a dozing state for a short time as the vehicle speed is high on a general road in an urban area, and it is possible to determine whether to look aside and dozing driving It can be performed more appropriately.

As shown in FIG. 21B, the inter-vehicle time at which the allowable time becomes the maximum value Tp may be corrected according to the type of road. When the correction 1 shown in (a) and the correction 2 shown in (b) are performed, the relationship between the inter-vehicle time L / V and the permissible time T1 becomes the relationship shown in (d). Since the maximum allowable value Tp of the drowsy state becomes shorter and the inter-vehicle time L / V at which the allowable time T1 becomes the maximum value Tp also becomes shorter, on a general road in an urban area, driving aside or driving asleep earlier than on an expressway or a main road. Can be determined, and an alarm for inattentive driving and drowsy driving can be issued at an appropriate timing according to the degree of risk of the road type.

<< Ninth Embodiment of the Invention >> Inter-vehicle time L /
The ninth embodiment allows the allowable time T1 of the inattentive state and the dozing state set based on V to be corrected according to the driving history of the driver.
An embodiment will be described.

FIG. 22 shows the configuration of the ninth embodiment.
The same components as those shown in FIG. 1 are denoted by the same reference numerals, and the description will focus on the differences. The driver information detecting device 9 identifies the driver, and searches the driver information table registered in advance for driving history information of the driver. As the driving history information, accumulated driving time or the like may be used in addition to years of driving experience. The ninth embodiment is the same as the first embodiment except that the driver information detecting device 9 constitutes driver information detecting means.

As for the method of identifying the driver, a keyless entry system for permitting only a registered driver to lock and unlock the door, an immobilizer for permitting the start of the engine, a driver seat position for each driver, and the like. Driver ID used in automatic driving position systems that automatically adjust the position of the rearview mirror
, The driver ID is input from those devices, and the driving history information corresponding to the driver ID is searched from the driver information table. Note that the method of identifying the driver is not limited to the method of the present embodiment. For example, the driver ID may be manually input.

FIG. 23 is a flowchart showing an alarm control program. The operation of the ninth embodiment will be described with reference to this flowchart. The controller 4 repeatedly executes the alarm control program. Step 901
Steps 903 to 903 are the same as steps 101 to 103 in FIG. In step 904 after the calculation of the inter-vehicle time L / V, the driver is identified by the driver information detecting device 9 and the driving history is detected. The following step 905
The processing of 908 is the same as the processing of steps 104 to 107 in FIG.

From the permissible time table for inter-vehicle time shown in FIG. 4, the permissible time T1 for the current inter-vehicle time L / V
Is read, in step 909, the allowable time T1 is corrected according to the driving history of the driver. This correction will be described later. After correcting the permissible time T1 according to the driving history, at step 910, the duration T0 of the inattentive state or the dozing state
Is compared with the permissible time T1 after the correction, and when the continuation time T0 of the inattentive state or the dozing state is equal to or more than the permissible time T1, it is determined that the driver is performing inattentive driving or dozing driving, and the process proceeds to step 911. The alarm device 5 is operated.

FIG. 24 shows a correction example of the allowable time T1 in the inattentive state and the dozing state according to the driving history of the driver. A driver who has little driving experience cannot sufficiently predict the danger to an obstacle, and the evasive reaction tends to be slower than a skilled person. Therefore, a driver with little driving experience must monitor the front more carefully than a skilled person. In this embodiment, as shown in (a), the maximum value Tp of the allowable time in the inattentive state and the dozing state is corrected according to the driving history of the driver. In other words, the correction is performed so that the beginner having a shorter driving history such as the number of years of driving experience or the accumulated driving time has a shorter allowable time maximum value Tp. With this correction, the relationship between the inter-vehicle time L / V and the permissible time T1 becomes the relationship shown in (c), and a beginner with a shorter driving history is determined to be an inattentive driving or a dozing driving even in an inattentive state or a dozing state of a shorter time. In other words, it is possible to warn the inattentive driving and the drowsy driving at an appropriate timing according to the driving history.

As shown in FIG. 24B, the inter-vehicle time at which the allowable time becomes the maximum value Tp may be corrected according to the driving history of the driver. Correction 1 shown in (a) and Correction 2 shown in (b)
Is performed, the relationship between the inter-vehicle time L / V and the allowable time T1 becomes a relationship shown in (d), and the beginner with a shorter driving history has a shorter allowable time maximum value Tp in the inattentive state and the dozing state,
Since the inter-vehicle time L / V at which the allowable time T1 reaches the maximum value Tp is also shorter, a beginner with a shorter driving history can be judged earlier as inattentive driving or dozing driving, and inattentive driving and dozing driving at appropriate timings according to the driving history. Alarm can be issued.

<< Tenth Embodiment of the Invention >> The inter-vehicle time L
A tenth aspect in which the allowable time T1 of the inattentive state and the dozing state set based on / V is corrected according to the relationship between the driver's usual inter-vehicle time and the inattentive state time, that is, the driver's inattentive tendency. An embodiment will be described.

The configuration of the tenth embodiment is the same as the configuration shown in FIG. The driver information detecting device 9 identifies the driver, learns the relationship between the usual inter-vehicle time and the inattentive state time for each driver, and stores the relationship as the inattentiveness of the driver. The method for identifying the driver uses the method described in the ninth embodiment.

FIG. 25 is a flowchart showing an alarm control program. The operation of the tenth embodiment will be described with reference to this flowchart. The controller 4 repeatedly executes the alarm control program. Step 10
The processes of 01 to 1003 are performed in steps 101 to 103 of FIG.
And the description is omitted. Inter-vehicle time L / V
In step 1004 after the calculation, the driver is identified by the driver information detection device 9 and the relationship between the driver's usual inter-vehicle time and the inattentive state time is read. Subsequent steps 1005-1
The processing of 008 is the same as the processing of steps 104 to 107 in FIG.

From the table of allowable time for inter-vehicle time shown in FIG. 4, the allowable time T1 for the current inter-vehicle time L / V
Is read, in step 1009, the allowable time T1 is corrected according to the relationship between the driver's usual inter-vehicle time and the inattentive state time. This correction will be described later. Allowable time T according to the relationship between the driver's usual inter-vehicle time and inattentive state time
After the correction of 1, the duration T0 of the inattentive state or the dozing state is compared with the corrected allowable time T1 at step 1010, and when the duration T0 of the inattentive state or the dozing state is equal to or longer than the allowable time T1, the driver may It is determined that the inattentive driving or the drowsy driving is being performed, the process proceeds to step 1011, and the alarm device 5 is operated.

FIG. 26 shows an example of correction of the allowable time T1 between the inattentive state and the dozing state according to the relationship between the driver's usual inter-vehicle time and the inattentive state time. There are individual differences in the inattentive state of the driver while traveling, and there are some persons who have a long inattentive state time and some persons who have an inattentive state time even at the same inter-vehicle time. Therefore, in this embodiment, the relationship between the normal inter-vehicle time and the inattentive state time is learned for each driver, and based on this relationship, as shown in FIG. Is corrected. That is, when comparing the inattentive state time of each driver with substantially the same inter-vehicle time, the correction is performed such that the shorter the inattentive state time is, the shorter the allowable time maximum value Tp is. By this correction, the relationship between the inter-vehicle time L / V and the allowable time T1 becomes (c)
The following relationship is shown, and a short inattentive time alerts a driver who has a short inattentive time to the normal inter-vehicle time, and a long inattentive time to a driver who has a long inattentive time with respect to the normal inter-vehicle time. An alarm is issued, and an alarm for inattentive driving can be issued at a timing without a sense of incongruity in accordance with the usual inattentive tendency of each driver.

As shown in FIG. 26B, the inter-vehicle time at which the allowable time becomes the maximum value Tp may be corrected according to the driver's inattentiveness. When the correction 1 shown in (a) and the correction 2 shown in (b) are performed, the relationship between the inter-vehicle time L / V and the allowable time T1 becomes the relationship shown in (d), and the inattentive time with respect to the normal inter-vehicle time is The shorter the driver, the shorter the maximum allowable time Tp of the inattentive state and the dozing state, and the maximum allowable time T1 is Tp.
The inter-vehicle time L / V is also shortened, so that an alert for inattentive driving can be issued at a timing without a sense of incongruity according to the usual inattentiveness of each driver.

In the above-described second to tenth embodiments, the example in which the allowable time T1 with respect to the inter-vehicle time L / V is corrected has been described, but a plurality of correction examples may be combined. .

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a first embodiment.

FIG. 2 is a diagram illustrating an installation state of each component device of the first embodiment in a vehicle.

FIG. 3 is a flowchart illustrating an alarm control program according to the first embodiment.

FIG. 4 is a diagram showing an example of an allowable time table of an inattentive state and a dozing state with respect to an inter-vehicle time.

FIG. 5 is a flowchart illustrating an alarm control program according to a second embodiment.

FIG. 6 is a diagram illustrating a correction example of an allowable time in an inattentive state and a dozing state according to a vehicle speed.

FIG. 7 is a diagram illustrating a configuration of a third embodiment.

FIG. 8 is a flowchart illustrating an alarm control program according to a third embodiment.

FIG. 9 is a diagram illustrating a correction example of an allowable time in an inattentive state and a dozing state according to acceleration.

FIG. 10 is a diagram illustrating a configuration of a fourth embodiment.

FIG. 11 is a flowchart illustrating an alarm control program according to a fourth embodiment.

FIG. 12 is a diagram illustrating an example of correction of an allowable time in an inattentive state and a dozing state according to a steering angle.

FIG. 13 is a diagram illustrating a configuration of a fifth embodiment.

FIG. 14 is a flowchart illustrating an alarm control program according to a fifth embodiment.

FIG. 15 is a diagram illustrating a correction example of an allowable time in an inattentive state and a dozing state according to a traffic congestion state.

FIG. 16 is a flowchart illustrating an alarm control program according to the sixth embodiment.

FIG. 17 is a diagram illustrating an example of correction of an allowable time in an inattentive state and a dozing state according to day and night.

FIG. 18 is a flowchart illustrating an alarm control program according to the seventh embodiment.

FIG. 19 is a diagram illustrating an example of correction of an allowable time in an inattentive state and a dozing state according to the weather.

FIG. 20 is a flowchart illustrating an alarm control program according to the eighth embodiment.

FIG. 21 is a diagram illustrating an example of correction of an allowable time in an inattentive state and a dozing state according to a road type.

FIG. 22 is a diagram illustrating a configuration of a ninth embodiment.

FIG. 23 is a flowchart showing an alarm control program according to the ninth embodiment.

FIG. 24 is a diagram illustrating an example of correction of an allowable time in an inattentive state and a dozing state according to a driving history of a driver.

FIG. 25 is a flowchart showing an alarm control program according to the tenth embodiment.

FIG. 26 is a diagram illustrating an example of correction of an allowable time in an inattentive state and a dozing state according to a relationship between a driver's usual inter-vehicle time and inattentive state time.

[Explanation of symbols]

 Reference Signs List 1 vehicle speed sensor 2 inter-vehicle distance sensor 3 driver state detection device 4 controller 4a CPU 4b ROM 4c RAM 4d timer 5 alarm device 6 acceleration sensor 7 steering angle sensor 8 traveling environment detection device 9 driver information detection device

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3D037 FA01 FA05 FB09 5C086 AA23 AA47 AA52 BA22 CA21 DA40 EA11 EA13 EA41 EA45 FA02 5H180 CC01 CC04 CC09 CC11 CC12 EE18 FF13 LL01 LL04 LL06 LL20

Claims (14)

[Claims] 1. A driver state detecting means for detecting an inattentive state and a dozing state of a driver; a time measuring means for measuring a duration of the inattentive state and a dozing state of the driver; a vehicle speed detecting means for detecting a vehicle speed; An inter-vehicle distance detecting means for detecting an inter-vehicle distance with a preceding vehicle; an inter-vehicle time calculating means for calculating an inter-vehicle time with the preceding vehicle based on the detected vehicle speed and the detected inter-vehicle distance; An allowable time setting means for searching and setting an allowable time corresponding to the calculated inter-vehicle time from a table of allowable times for the inter-vehicle time set in advance so that the time becomes a maximum value, and continuation of the inattentive state or the dozing state Determining that the driver is performing inattentive driving or drowsy driving when the time exceeds the permissible time set value. Driving warning device. 2. The warning device for inattentive driving and drowsy driving according to claim 1, further comprising an alarming device for giving an alarm to the driver when the judging device determines that the driver is looking aside or drowsy. Inattentive driving and dozing driving alarm device. 3. The alarm system for inattentive driving and drowsy driving according to claim 1 or 2, wherein the maximum value of the allowable time of the table or the inter-vehicle time at which the allowable time is the maximum value is higher than the detected vehicle speed. An alarm device for inattentive driving and drowsy driving, comprising a correction means for shortening the driving speed. 4. The inattentive driving and drowsy driving alarm device according to claim 1, wherein the maximum value of the allowable time of the table or the inter-vehicle time at which the allowable time is the maximum is determined by the inter-vehicle distance detection value. An alarm device for inattentive driving and drowsy driving, comprising a correction unit that shortens the length of the driving. 5. The inattentive driving and drowsy driving warning device according to claim 1 or 2, wherein: an acceleration detecting means for detecting an acceleration of the vehicle; and a maximum value or a maximum allowable time in the table. Correction means for shortening the following inter-vehicle time as the acceleration detection value increases, wherein the inattentive driving and dozing driving alarm device is provided. 6. A warning system for inattentive driving and drowsy driving according to claim 1 or 2, wherein: a steering angle detecting means for detecting a steering angle of the vehicle; A warning means for inattentive driving and drowsy driving, comprising: a correcting means for shortening the inter-vehicle time as a value as the steering angle detection value increases. 7. The alarm system for inattentive driving and drowsy driving according to claim 1 or 2, wherein: a driving environment detecting means for detecting a driving environment of the vehicle; and a maximum allowable time or maximum allowable time of the table. A warning device for inattentive driving and drowsy driving, comprising: a correcting means for correcting the inter-vehicle time as a value according to the driving environment detection result. 8. The alarm device for inattentive driving and drowsy driving according to claim 7, wherein the driving environment detecting means detects a congestion situation, and the correcting means sets a maximum value or a maximum allowable time of the table. An inattentive driving and drowsy driving alarm device, characterized in that the inter-vehicle time, which is a value, becomes shorter as the congestion situation becomes more crowded. 9. The alarm device for inattentive driving and drowsy driving according to claim 7, wherein the driving environment detecting means detects day or night, and the correcting means sets a maximum value or an allowable time of the allowable time of the table. An inattentive driving and drowsy driving alarm device, characterized in that the maximum inter-vehicle time is shortened at night. 10. The alarm device for inattentive driving and drowsy driving according to claim 7, wherein the driving environment detecting means detects the weather, and the correcting means sets a maximum value of the allowable time or a maximum value of the allowable time of the table. An inattentive driving and drowsy driving alarm device, wherein the inter-vehicle time becomes shorter as the weather becomes worse. 11. The alarm system for inattentive driving and drowsy driving according to claim 7, wherein the driving environment detecting means detects a road type, and the correcting means sets a maximum value or a maximum allowable time of the table. An inattentive driving and drowsy driving warning device, characterized in that the value of the inter-vehicle time, which is a value, is shortened when driving on a general road in an urban area. 12. An alarm device for inattentive driving and drowsy driving according to claim 1 or 2, wherein a driver information detecting means for detecting information about the driver; and a maximum value or an allowable time of the allowable time of the table. A warning device for inattentive driving and drowsy driving, comprising: a correcting means for correcting a maximum inter-vehicle time according to the detection result of the driver information. 13. The inattentive driving and drowsy driving warning device according to claim 12, wherein the driver information detecting means detects a driving history of the driver, and the correcting means sets a maximum value of an allowable time of the table or An inattentive driving and drowsy driving alarm device, wherein the inter-vehicle time at which the allowable time becomes a maximum value is shortened as the driving history becomes longer. 14. The alarm device for inattentive driving and drowsy driving according to claim 12, wherein the driver information detecting means detects a tendency of the driver to look aside, and the correcting means includes a maximum value of an allowable time of the table or An inattentive driving and dozing driving alarm device, wherein the inter-vehicle time range in which the allowable time is the maximum value is corrected according to the detection result of the inattentive driving tendency.