JP2008243031A - Careless driving determination device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a careles driving determination device, for detecting a driver's careless driving. <P>SOLUTION: A visual line direction detection part 42 detects the visual line direction of a driver who drives a vehicle for a predetermined period, and a distribution information generation part 44 generates visual line distribution information showing a distribution of the visual line. A drive state determination part 46 determines a careless driving when a predetermined position of a distribution shown by the generated visual line distribution information is distant upwardly by a predetermined distance or more from a standard position of visual line direction in a non-careless driving state shown by reference information preliminarily stored in a nonvolatile memory 28. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an abrupt driving determination device, and more particularly to an abrupt driving determination device that detects whether or not a driver is driving by detecting the line of sight of a driver driving a vehicle.

  Conventionally, various techniques for detecting the driver's driving state by detecting the line of sight of the driver driving the vehicle have been proposed.

  For example, the number of times that the driver confirms the rearview mirror and the side mirror tends to decrease during a rough driving as compared to during normal driving. Therefore, in Patent Document 1, the number of confirmations by which the driver has confirmed the rearview mirror and the side mirror is measured, and it is determined whether or not the driver is driving freely by comparing the measured number of confirmations with a predetermined threshold value. Technology is disclosed.

  Also, the driver's line-of-sight direction generally tends to converge to a single point when the driver's arousal level decreases. Therefore, in Patent Document 2, a gaze direction frequency distribution pattern is created by detecting the driver's gaze direction, and the created frequency distribution pattern is compared with a pre-created frequency distribution pattern at awakening. A technique for detecting a decrease in arousal level based on the degree of convergence is disclosed.

Furthermore, the frequency with which the driver confirms the direction of the vehicle periphery tends to decrease when driving abruptly compared to during normal driving. Therefore, Patent Document 3 divides an area visible to the driver into a vehicle forward direction area and a vehicle peripheral area, and gives a gaze frequency ff that the driver gazes at the vehicle front direction area and a gaze frequency fs that gazes at the vehicle peripheral area. A technique for detecting the state of a driver by determining and comparing the gaze frequency ff and the gaze frequency fs with a threshold value corresponding to the driving environment is disclosed.
Japanese Patent No. 3257310 Japanese Patent Laid-Open No. 9-20157 JP 2003-80969 A

  However, the techniques described in Patent Documents 1 to 3 have a problem that the driver's casual driving may not be detected.

  That is, in the technique described in Patent Document 1, when the vehicle is traveling on a road situation in which it is not necessary to check the rearview mirror and the side mirror, the driver's casual driving may not be detected.

  Moreover, in the technique described in Patent Document 2, a decrease in the driver's arousal level is detected by detecting the tendency of the line-of-sight direction to converge to one point. Therefore, the driver may not be able to detect a casual driving.

  Furthermore, in the technique described in Patent Document 3, the driver only obtains the frequency of watching the vehicle front direction area and each vehicle peripheral area, and within the vehicle front direction area during normal driving and loose driving. Since the driver does not pay attention to the change in the distribution of the gaze direction, the driver may not be able to detect the rough driving.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a casual driving determination device that can detect a driver's random driving.

  In order to achieve the above object, the invention described in claim 1 is directed to detecting a gaze direction detecting means for detecting a gaze direction of a driver driving the vehicle, and detecting the gaze direction of the driver for a predetermined period by the gaze direction detecting means. Generated by the distribution information generating means for generating the gaze distribution information indicating the distribution of the gaze direction, the storage means preliminarily storing the standard position in the gaze direction in the state of not driving as the reference information, and the distribution information generating means Determining means for determining that the vehicle is in a random operation when a predetermined position of the distribution indicated by the line-of-sight distribution information is more than a predetermined amount above the position indicated by the reference information stored in the storage means; It is equipped with.

  In the first aspect of the invention, the gaze direction of the driver who drives the vehicle is detected by the gaze direction detection means, and the gaze direction of the driver is detected by the gaze direction detection means by the distribution information generation means for a predetermined period of time. The line-of-sight distribution information indicating the direction distribution is generated, and the standard position of the line-of-sight direction in a state where the driver is not driving is stored in advance as reference information in the storage means.

  In the present invention, the predetermined position of the distribution indicated by the line-of-sight distribution information generated by the distribution information generating means is separated by a predetermined amount or more upward from the position indicated by the reference information stored in the storage means. If it is, it is determined that the driver is driving casually.

  As described above, according to the first aspect of the present invention, the gaze direction information of the gaze direction distribution is generated by detecting the gaze direction of the driver who drives the vehicle for a predetermined period, and is indicated by the generated gaze distribution information. If the predetermined position of the distribution is more than a predetermined amount away from the standard position in the line-of-sight direction in the state of non-random driving indicated by the pre-stored reference information, it is determined that the driving is random driving. Therefore, it is possible to detect the driver's casual driving.

  According to the present invention, as in the invention described in claim 2, the storage means detects the line-of-sight direction by the line-of-sight direction detection means when the driver has driven the vehicle in a state where the driver has not been driving indiscriminately before. The line-of-sight distribution information generated by the distribution information generation unit using the reference information is stored as the reference information, and the determination unit determines that the predetermined position of the distribution indicated by the line-of-sight distribution information is the predetermined position of the distribution indicated by the reference information If it is more than a predetermined amount away in the upward direction, it may be determined that the driving is random.

  Further, as in the invention according to claim 3, the present invention preferably further comprises warning means for giving a warning to the driver when it is determined by the determination means that the driving is random.

  In addition, as in the invention according to claim 4, the present invention further includes distance detection means for detecting a distance from the vehicle to a preceding vehicle traveling immediately in front of the vehicle, and the storage means is provided from the vehicle. For each distance range in which the distance in the forward direction is divided into a plurality of distance ranges, the reference information in the distance range is stored, and the determination means has a predetermined position of the distribution indicated by the line-of-sight distribution information as the storage means If it is more than a predetermined amount above the position indicated by the reference information corresponding to the distance range including the distance detected by the distance detection means stored in Also good.

  According to a fourth aspect of the present invention, as in the fifth aspect of the present invention, the distance detected by the distance detecting means is determined in advance by the determination means so that the driver watches the vehicle ahead. If the distance is within the specified distance, it may not be determined that the driving is random.

  Further, according to the present invention, as in the sixth aspect of the invention, the steering angle detecting means for detecting the steering angle by the driver's steering operation, and the steering angle is detected by the steering angle detecting means for a predetermined period to detect the steering angle. Steering angle change data generating means for generating steering angle change data indicating the change of the spectrum, spectrum deriving means for deriving spectrum information indicating the steering angle spectrum from the steering angle change data generated by the steering angle change data generating means, In the spectrum indicated by the spectrum information derived by the spectrum deriving means, a predicted frequency component which is a gentle steering operation by prediction according to the driver's road condition, and the position of the vehicle moved by the steering operation by the prediction Means for identifying a corrected steering component that is a sudden steering operation for correcting The ratio of the predicted steering component to the corrected frequency component specified by the specifying unit is not less than a predetermined ratio, and the predetermined position of the distribution indicated by the line-of-sight distribution information is the reference information. It may be determined that the vehicle is driving indecently when it is a predetermined amount or more away from the position indicated by.

  As described above, according to the present invention, the gaze direction information of the gaze direction distribution is generated by detecting the gaze direction of the driver who drives the vehicle for a predetermined period, and the distribution indicated by the generated gaze distribution information Since it is determined that the predetermined position is more than a predetermined amount in the upward direction from the standard position in the line-of-sight direction in the state where the predetermined position is not indicated by the preliminarily stored reference information, It has an excellent effect that it is possible to detect a driver's casual driving.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
FIG. 1 shows a schematic configuration of a casual driving determination device 10 according to the first embodiment.

  As shown in the figure, the casual driving determination device 10 includes an infrared irradiator 12 that irradiates the driver with infrared rays, a CCD (Charge Coupled Device) camera 14 that captures a predetermined area including the driver's face, An apparatus main body 20 that detects the driver's line-of-sight direction based on an image obtained by photographing with the CCD camera 14 and determines whether the driver is driving casually based on the change in the line-of-sight direction. It is configured to include.

  As shown in FIG. 1, the apparatus body 20 includes a CPU (Central Processing Unit) 22 that controls the operation of the casual driving determination apparatus 10, and a RAM (Random Access) used as a work area when the CPU 22 executes various processing programs. Memory) 24, ROM (Read Only Memory) 26 in which various control programs including various driving determination processing programs, which will be described later, various parameters, and the like are stored in advance, and reference information serving as a reference for determining that the driving is random driving Non-volatile memory 28 such as a flash memory for storing various kinds of information, a lighting control unit 30 for controlling lighting of the infrared irradiator 12 by controlling power supply to the infrared irradiator 12, and photographing by the CCD camera 14 A camera control unit 32 that controls the operation to acquire image data indicating an image taken from the CCD camera 14 and warns the driver It includes a speaker 34 for performing a.

  The CPU 22, RAM 24, ROM 26, nonvolatile memory 28, lighting control unit 30, camera control unit 32, and speaker 34 are connected to each other via a system bus BUS.

  Accordingly, the CPU 22 controls access to the RAM 24, ROM 26, and nonvolatile memory 28, controls lighting of the infrared irradiator 12 via the lighting control unit 30, and controls photographing operation of the CCD camera 14 via the camera control unit 32. And control of output of sound from the speaker 34 can be performed.

  FIG. 2 is a functional block diagram showing a functional configuration of the casual driving determination device 10 according to the present embodiment.

  As shown in the figure, the casual driving determination device 10 includes a photographing control unit 40, a line-of-sight direction detection unit 42, a distribution information generation unit 44, and a driving state determination unit 46.

  The imaging control unit 40 instructs the infrared irradiator 12 to turn on and causes the infrared irradiator 12 to irradiate the driver with infrared rays, and controls the CCD camera 14 to control a predetermined area including the driver's face. Let them shoot. The CCD camera 12 outputs image data indicating a photographed image every time photographing is performed.

  The line-of-sight direction detection unit 42 receives image data output from the CCD camera 12. Each time image data is input, the line-of-sight direction detection unit 42 specifies the driver's pupil center and the corneal reflection center point by infrared irradiation from the image indicated by the image data. Then, the gaze direction detection unit 42 detects the gaze direction based on the positions of the specified pupil center and corneal reflection center point, and generates coordinate data indicating the gaze direction detected using the position of the driver's head as the reference coordinates. To do. In the line-of-sight direction detection unit 42 according to the present embodiment, as shown in FIG. 3, the road region A corresponding to the road portion (approximately 20 degrees in the vertical direction and approximately 30 degrees in the horizontal direction) among the regions visible to the driver. In this area, coordinate data indicating the coordinate position in the line-of-sight direction is generated with the X direction as the vertical direction and the Y coordinate as the horizontal direction.

  The distribution information generation unit 44 temporarily stores the coordinate data generated by the line-of-sight direction detection unit 42, and the coordinates in the line-of-sight direction indicated by the stored coordinate data for the most recent predetermined period (for example, 5 seconds). Gaze distribution information indicating the gaze direction distribution is generated by plotting the position.

  The reference information described above is stored in advance in the nonvolatile memory 28. In the present embodiment, the line-of-sight direction when the driver has previously driven the vehicle in a state where the driver has not been driving unambiguously is used for a predetermined time (for example, 5 minutes). The line-of-sight distribution information generated by the distribution information generation unit 44 is stored as reference information.

  Here, in the present invention, since the driver considers things other than driving while the driver is driving, for example, the processing capacity to be allocated to driving is reduced and driving is performed.

  FIG. 4A shows an example of the distribution of the line of sight when the vehicle is driven in a state where the driver is not driving freely (normal driving state), and FIG. An example of the distribution of the line-of-sight direction when the vehicle is driven in a casual driving state is shown. 4A and 4B show the results of detecting the driver's line-of-sight direction using a driving simulator, and FIG. 4B shows the result of driving the driver in order to intentionally create a casual driving state. This is the result of having other sub-tasks other than driving performed at the same time. The secondary challenge is to push the buttons on the left and right ends of the steering in response to lamps that light randomly on the left and right of the driving simulator screen. 4A and 4B, the distribution of the line-of-sight direction in the road region A is shown in a darker color as the line-of-sight frequency is higher on the horizontal direction 640 × vertical direction 480 coordinates.

  As shown in FIGS. 4 (A) and 4 (B), it can be confirmed that the driver's line-of-sight direction distribution rises more gently during driving than in normal driving.

  This is because when the driver thinks about other things while driving, to reduce the processing capacity to be allocated to driving, look at the distance of the road and perform steering operation by prediction according to the road situation Conceivable.

  Therefore, the driving state determination unit 46 (see FIG. 2) is a reference information in which a predetermined position of the distribution indicated by the line-of-sight distribution information generated by the distribution information generation unit 44, for example, the center position is stored in the nonvolatile memory 28. When a predetermined amount or more is away from the center position of the distribution indicated by (2), it is determined that the driving is random, and the speaker 34 is instructed to generate a warning sound.

  By the way, the processing by each component (the line-of-sight detection unit 42, the distribution information generation unit 44, and the driving state determination unit 46) of the casual driving determination device 10 configured as described above is executed by executing a program. It can be realized by using a software configuration. However, the present invention is not limited to realization by a software configuration, and needless to say, it can also be realized by a hardware configuration or a combination of a hardware configuration and a software configuration.

  Below, the case where the random driving determination apparatus 10 which concerns on this Embodiment implement | achieves the process by said each component by executing a random driving determination processing program is demonstrated. In this case, the random driving determination processing program is installed in advance in the ROM 26 or the non-volatile memory 28, provided in a state stored in a computer-readable recording medium, or via wired or wireless communication means. It is possible to apply a form that is distributed in such a manner.

  Next, with reference to FIG. 5, the operation of the casual driving determination device 10 according to the present embodiment will be described. FIG. 5 is a flowchart showing a flow of processing of the random driving determination processing program executed by the CPU 22. The random driving determination processing program is executed by the CPU 22 when a processing start instruction signal is received from a vehicle control device (not shown), for example, when an engine switch of a vehicle equipped with the random driving determination device 10 is turned on. .

  In step 100 in the figure, a threshold value used for the determination of the rough driving is determined from the reference information stored in the nonvolatile memory 28. Specifically, the values of ± 3σ (Y1, Y2) in the vertical direction from the center position X1 are determined as the threshold values in the distribution in the line-of-sight direction in the state where the driver is not driving unambiguously indicated by the reference information.

  In the next step 102, for example, it is determined whether or not a processing end instruction signal is input from a vehicle control device (not shown) due to, for example, turning off the engine switch of the vehicle. On the other hand, if the determination is affirmative, the processing of this random driving determination processing program ends.

  In step 120, the infrared irradiator 12 is instructed to turn on and the infrared irradiator 12 emits infrared light to the driver, and the CCD camera 14 is controlled to photograph a predetermined area including the driver's face. . Thereby, the CCD camera 12 outputs image data indicating the photographed image.

  In the next step 122, the driver's line-of-sight direction is detected from the image indicated by the image data input from the CCD camera 12 to generate coordinate data indicating the line-of-sight direction, and the generated coordinate data is temporarily stored in the RAM 24. To do.

  In the next step 124, line-of-sight distribution information indicating the line-of-sight direction distribution is generated from the coordinate data for the latest predetermined period (for example, 5 seconds) stored in the RAM 24.

  FIG. 6 schematically shows the distribution in the line-of-sight direction indicated by the reference information and the distribution indicated by the line-of-sight distribution information generated in step 124.

  In the next step 126, the center position X2 of the distribution indicated by the line-of-sight distribution information generated in step 124 is compared with the threshold value (Y1, Y2) determined in step 102, and the center position X2 is the threshold value (Y1, Y2). It is determined whether or not it is upward.

  And in this step 126, when it becomes affirmation determination as a result of determination, since the driver is in a loose driving state, the process proceeds to step 128, whereas when it becomes negative determination, the driver is in a normal driving state, In order to continue detection of casual driving, the process proceeds to step 102 again.

  In step 128, the speaker 34 is instructed to generate a warning sound, and a warning sound is generated from the speaker 34 to warn that it is a rough driving. Then, the process proceeds to step 102 again.

  As described above, according to the present embodiment, the gaze direction information of the gaze direction distribution is generated by detecting the gaze direction of the driver who drives the vehicle for a predetermined period, and is indicated by the generated gaze distribution information. When the center position of the distribution is more than a predetermined amount above the center position of the distribution in the line-of-sight direction in the state where the driver's non-rough driving is indicated by reference information stored in advance, it is determined that the driver is driving freely Therefore, it is possible to detect a driver's casual driving.

[Second Embodiment]
FIG. 7 shows a schematic configuration of the casual driving determination device 10 according to the second embodiment. The same parts in FIG. 1 as those in FIG. 1 are denoted by the same reference numerals as those in FIG.

  As shown in the figure, the casual driving determination device 10 further includes, for example, a laser survey meter 16 attached in front of the vehicle in the traveling direction, such as a bumper in front of the vehicle.

  The apparatus body 20 further includes a preceding vehicle distance detection unit 36 and a steering steering angle detection unit 38.

  The laser survey meter 16 includes, for example, a light emitting element that emits an infrared light pulse and a light receiving element that receives an infrared light pulse reflected by an object to be detected.

  The preceding vehicle distance detecting unit 36 is configured to receive the infrared light pulse reflected by the preceding vehicle on the basis of the time when the light emitting element of the laser survey meter 16 emits light and is irradiated with the infrared light pulse. Based on the time, the distance to the preceding vehicle just before the vehicle as a reference is measured, and distance information indicating the distance is output.

  A signal corresponding to the steering angle of the steering is input to the steering angle detector 38 from an angle sensor (not shown) provided on the steering shaft of the vehicle. The steering angle detector 38 detects the steering angle of the steering based on the input signal.

  FIG. 8 is a functional block diagram showing a functional configuration of the casual driving determination device 10 according to the second embodiment. 2 that are the same as those in FIG. 2 are assigned the same reference numerals as in FIG. 2, and descriptions thereof are omitted.

  As shown in the figure, the casual driving determination device 10 further includes a steering angle change data generation unit 50, a spectrum derivation unit 52, and a frequency component identification unit 54.

  The steering angle information output from the steering angle detector 38 is input to the steering angle change data generator 50. The steering angle change data generation unit 50 temporarily stores the input steering angle information, and indicates the change of the steering angle from the stored steering angle information for the most recent predetermined period (for example, 5 seconds). Generate change data.

  The spectrum deriving unit 52 derives spectrum information indicating the steering angle spectrum from the steering angle change data generated by the steering angle change data generating unit 50. The technique for deriving the steering angle spectrum is described in, for example, “Analysis of Steering Motion Using a Driver Model”, Automotive Engineering Society Technical Lecture Preprint No. 117-06, and Japanese Patent Application Laid-Open No. 7-290990. Therefore, the description is omitted here.

  The frequency component specifying unit 54 uses a predetermined determination frequency (in this case, 0.25 Hz) as a threshold in the spectrum indicated by the spectrum information derived by the spectrum deriving unit 52, and gradually reduces the frequency component by the prediction according to the driver's road condition. A predicted frequency component that is a correct steering operation and a corrected steering component that is a sudden steering operation for correcting the position of the vehicle moved by the steering operation based on the prediction are specified.

  Here, FIG. 9A shows an example of a steering angle spectrum when the driver drives the vehicle in the normal driving state or the rough driving state, and FIG. An example of the steering angle spectrum when the vehicle is driven in the dozing state is shown.

  As shown in FIGS. 9A and 9B, in the steering angle spectrum, when the driver is in the normal driving state or the rough driving state, the predicted frequency component α becomes more dominant than the corrected steering component β, and the driver falls asleep. In the state, it can be confirmed that the corrected steering component β is more dominant than the predicted frequency component α.

  Therefore, the driving state determination unit 46 (see FIG. 8) has the ratio of the predicted steering component to the corrected frequency component specified by the frequency component specifying unit 54 equal to or greater than a predetermined rate and is generated by the distribution information generation unit 44. When the center position of the distribution indicated by the line-of-sight distribution information is more than a predetermined amount above the center position of the distribution indicated by the reference information stored in the non-volatile memory 28, it is determined that the driving is random. The speaker 34 is instructed to generate a warning sound. Further, when the ratio of the predicted steering component to the corrected frequency component is smaller than a predetermined ratio, the driving state determination unit 46 determines that the driving is dozing and instructs the speaker 34 to generate a warning sound. In addition, the said predetermined ratio applies what obtained the ratio which can discriminate | determine a normal driving | running state, a rough driving state, and a dozing driving state by the experiment using a real vehicle, computer simulation, etc. Since the predetermined ratio slightly changes depending on the characteristics of the vehicle and the driver, the predetermined ratio may be changed according to the vehicle and the driver.

  The distribution of the driver's line-of-sight direction also changes depending on the distance to the preceding vehicle traveling immediately before.

  That is, the driver tends to pay attention to the preceding vehicle in order to distribute the attention to the movement of the preceding vehicle rather than the surrounding road conditions as the distance from the preceding vehicle becomes shorter.

  For this reason, in the present embodiment, the nonvolatile memory 28 stores reference information in the distance range for each distance range obtained by dividing the distance from the vehicle in the forward direction into a plurality of distance ranges. In the present embodiment, reference information is provided for each distance range of 0 to less than 30 m, 30 to less than 60 m, and 60 m or more.

  The driving state determination unit 46 receives the distance information output from the laser survey meter 16. The driving state determination unit 46 uses the reference information corresponding to the distance range including the distance indicated by the distance information input from the preceding vehicle distance detection unit 36 stored in the non-volatile memory 28 to determine whether the driving state is a random driving. Make a decision.

  By the way, processing by each component (steering angle change data generation unit 50, spectrum deriving unit 52, and frequency component specifying unit 54) of the casual driving determination device 10 according to the present embodiment is also executed by executing a program. It can be realized by a software configuration using a computer.

  Below, the case where the random driving determination apparatus 10 which concerns on this Embodiment implement | achieves the process by said each component by executing a random driving determination processing program is demonstrated.

  FIG. 10 shows the flow of processing of the random driving determination processing program according to the second embodiment. In the figure, the same processes as those in FIG. 5 are denoted by the same reference numerals as those in FIG.

  In step 101 in the figure, for each reference information of the distance ranges stored in the nonvolatile memory 28, a threshold value used for the determination of the rough driving is determined. Specifically, as described above in the processing of step 100, each of the values (Y1, Y2) of ± 3σ in the vertical direction from the center position X1 in the distribution in the line-of-sight direction indicated by the reference information corresponding to each distance range. The threshold is determined.

  In step 104, the steering angle detection unit 38 detects the current steering angle of the steering, and the steering angle information indicating the detected steering angle is temporarily stored in the RAM 24.

  In the next step 106, steering angle change data indicating a change in the steering angle is generated from the stored steering angle information for the most recent predetermined period (for example, 5 seconds).

  In the next step 108, spectral information indicating a steering angle spectrum is derived from the generated steering angle change data.

  In the next step 110, in the spectrum indicated by the derived spectrum information, the predicted frequency component and the corrected steering component are specified using the determination frequency (here, 0.25 Hz) as a threshold value.

  In the next step 112, it is determined whether or not the ratio of the predicted steering component to the specified corrected frequency component is equal to or greater than the predetermined ratio. If the determination is affirmative, the process proceeds to step 120 while the determination is negative. If the driver is in a drowsy driving state, the process proceeds to step 114.

  In step 114, the speaker 34 is instructed to generate a warning sound to generate a warning sound from the speaker 34, and then the process proceeds to step 102 again.

  On the other hand, in step 125, it is specified whether the distance to the preceding vehicle indicated by the distance information input from the preceding vehicle distance detecting unit 36 is a distance range of 0 to less than 30 m, 30 to less than 60 m, or 60 m or more.

  In step 127, a threshold value corresponding to the distance range specified in step 125 is specified from the threshold values (Y1, Y2) for each distance range determined in step 101, and the distribution indicated by the line-of-sight distribution information generated in step 124 Is compared with the specified threshold value (Y1, Y2), and it is determined whether the center position X2 is above the threshold value (Y1, Y2).

  And in this step 127, when it becomes affirmative determination as a result of determination, since the driver is in a loose driving state, the process proceeds to step 128, whereas when negative determination is made, the driver is in a normal driving state, In order to continue detection of casual driving, the process proceeds to step 102 again.

  As described above, according to the present embodiment, the reference information is stored for each distance range obtained by dividing the distance in the forward direction from the vehicle into a plurality of distance ranges, and corresponds to the distance from the actual preceding vehicle. Since the determination of the rough driving is performed using the reference information, the rough driving can be detected with high accuracy.

  Further, according to the present embodiment, since the steering angle spectrum of the steering operation is derived, it is possible to discriminate between the driver's drowsy driving and the casual driving.

  In each of the above-described embodiments, the case has been described where the gaze distribution information indicating the gaze direction distribution when the driver has driven the vehicle in the state where the driver has not been driving in the past is stored as the reference information. The standard position in the line-of-sight direction in a state where the user is not driving freely is stored as reference information, and the center position of the distribution indicated by the line-of-sight distribution information is a predetermined amount above the standard position. When it is far away, it may be determined that the driver is driving casually.

  Further, if the distance from the preceding vehicle is too close, the driver's line of sight may not rise even if the driver gazes at the vehicle ahead and makes a rough drive. For this reason, in each of the above-described embodiments, when the distance from the preceding vehicle is within a predetermined distance (for example, 30 m) as the driver gazes at the preceding vehicle, it is not determined that the driving is a random driving. Also good.

  In each of the above embodiments, the case where Y1 and Y2 are determined as threshold values for each reference information has been described. However, the present invention is not limited to this, and for example, only the upward threshold value Y1 is determined. It is also possible to make a determination.

  Further, in each of the above embodiments, the case where the warning sound is generated from the speaker 34 and the warning is given in the case of the casual driving or the snoozing driving is described, but the present invention is not limited to this. For example, any device may be used as long as it alerts the driver to a casual driving or a drowsy driving.

  In addition, the schematic configuration (see FIGS. 1 and 7) of the casual driving determination device 10 described in the above embodiments and the functional configuration (see FIGS. 2 and 8) of the similar example sentence search device 10 are examples. Needless to say, the present invention can be changed as appropriate without departing from the gist of the present invention.

  In addition, the processing flow of the random driving determination processing program (see FIGS. 5 and 10) described in the above embodiments is also an example, and can be appropriately changed without departing from the gist of the present invention. Needless to say.

It is a block diagram which shows schematic structure of the casual driving determination apparatus which concerns on 1st Embodiment. It is a block diagram which shows the functional structure of the casual driving determination apparatus which concerns on 1st Embodiment. It is a figure which shows the area | region A which detects a gaze direction among the area | regions seen from the driver | operator which concerns on embodiment. (A) is a distribution diagram showing an example of the distribution of the line-of-sight direction when the driver in the normal driving state drives the vehicle, and (B) is the line-of-sight direction when the driver in the rough driving state drives the vehicle. It is a distribution map which shows an example of distribution. It is a flowchart which shows the flow of a process of the casual driving determination processing program which concerns on 1st Embodiment. It is the distribution figure which showed typically the distribution of the gaze direction shown by reference | standard information, and the distribution shown by gaze distribution information. It is a block diagram which shows schematic structure of the casual driving determination apparatus which concerns on 2nd Embodiment. It is a block diagram which shows the functional structure of the casual driving determination apparatus which concerns on 2nd Embodiment. (A) is a distribution diagram showing an example of a steering angle spectrum when a driver in a normal driving state or a casual driving state drives a vehicle, and (B) is a steering when a driver in a dozing state drives the vehicle. It is a distribution map which shows an example of an angle spectrum. It is a flowchart which shows the flow of a process of the random driving | running | working determination processing program which concerns on 2nd Embodiment.

Explanation of symbols

28 Nonvolatile memory (storage means)
34 Speaker (Warning means)
36 Leading vehicle distance detection unit (distance detection means)
38 Steering steering angle detector (steering angle detector)
42 Gaze direction detection unit (Gaze direction detection means)
44 Distribution information generation unit (distribution information generation means)
46 Driving state determination unit (determination means)
50 Steering angle change data generation unit (steering angle change data generation means)
52 Spectrum deriving unit (spectrum deriving means)
54 Frequency component identification unit (identification means)

Claims (6)

Gaze direction detection means for detecting the gaze direction of the driver driving the vehicle;
Distribution information generating means for detecting a gaze direction of the driver for a predetermined period by the gaze direction detecting means and generating gaze distribution information indicating a gaze direction distribution;
Storage means for pre-stored as standard information the standard position of the line-of-sight direction in the state of not driving casually;
When the predetermined position of the distribution indicated by the line-of-sight distribution information generated by the distribution information generating means is more than a predetermined amount upward from the position indicated by the reference information stored in the storage means, Determination means for determining that there is,
A simple driving determination device equipped with. The storage means stores the line-of-sight distribution information generated by the distribution information generation means using the detection result of the line-of-sight direction by the line-of-sight direction detection means when the driver has previously driven the vehicle in a state where the driver has not driven freely. Storing as the reference information,
The determination unit determines that the driving is a random operation when a predetermined position of the distribution indicated by the line-of-sight distribution information is separated by a predetermined amount or more upward from a predetermined position of the distribution indicated by the reference information. 1 is a casual driving determination device. The random driving determination device according to claim 1, further comprising warning means for warning the driver when the determination means determines that the driving is random. Further comprising distance detecting means for detecting a distance from the vehicle to a preceding vehicle traveling immediately in front of the vehicle;
The storage means stores the reference information in the distance range for each distance range obtained by dividing the distance in the forward direction from the vehicle into a plurality of distance ranges,
The determination means has a predetermined position of the distribution indicated by the line-of-sight distribution information stored in the storage means, more than a position indicated by reference information corresponding to a distance range including a distance detected by the distance detection means. The random driving determination device according to any one of claims 1 to 3, wherein the driving is determined to be a random driving when a predetermined amount or more is away in an upward direction. 5. The random determination according to claim 4, wherein the determination unit does not determine random driving when the distance detected by the distance detection unit is within a predetermined distance as the driver gazes at the preceding vehicle. Driving determination device. Steering angle detection means for detecting a steering angle by the driver's steering operation;
Steering angle change data generating means for detecting a steering angle by the steering angle detecting means for a predetermined period and generating steering angle change data indicating a change in the steering angle;
Spectrum deriving means for deriving spectrum information indicating a steering angle spectrum from the steering angle change data generated by the steering angle change data generating means;
In the spectrum indicated by the spectrum information derived by the spectrum deriving means, a predicted frequency component which is a gentle steering operation by prediction according to the driver's road condition, and the position of the vehicle moved by the steering operation by the prediction And a specifying means for specifying a correction steering component that is a steep steering operation for correcting
The determination means has a ratio of the predicted steering component to the corrected frequency component specified by the specifying means equal to or greater than a predetermined ratio, and a predetermined position of the distribution indicated by the line-of-sight distribution information is greater than a position indicated by the reference information. The random driving determination device according to any one of claims 1 to 5, wherein the driving is determined to be a random driving when a predetermined amount or more is further away in the upward direction.