JP2000268297A - Safety drive evaluation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a safety drive evaluation device capable of urging safety drive by evaluating the contents of drive on the basis of detected information from a detection means and outputting its evaluation result to make a driver recognize the result. SOLUTION: A driver's state detection means 3 detects a driver's looking- aside state or the like and outputs a signal. A vehicle information detection means 5 detects the driving states of its own vehicle such as the speed and acceleration/deceleration of the vehicle and outputs a signal. A traveling environment detection means 7 detects traveling environments around the vehicle itself such as an inter-vehicle distance from a preceding vehicle, a state whether the traveling road is a freeway or not and a state whether it's rainy weather or not and outputs these detected results. A driving evaluation means 1 inputs detection information from respective detection means 3, 5, 7 and evaluates the driving contents of the driver on the basis of prescribed references. An evaluation output means 9 outputs the evaluation results of the means 1 to make the driver recognize them so that the evaluation results are displayed on a monitor or the like arranged in front of a driver's seat in the vehicle as an image or outputted by a voice.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safe driving evaluation device capable of evaluating the contents of driving based on a driver's condition and the like, and allowing the driver to recognize the evaluation result.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No.
-156262, JP-A-8-147852, JP-A-8-207617, JP-A-8-225
No. 028 and the like. In these devices, when performing a drowsiness alarm or an inattentive alarm, the surrounding environment of the vehicle, such as an expressway or a general road, and a driving operation state, for example, an image of the driver with a television camera, and eyes movements, An alarm can be issued with high accuracy by detecting a drowsy driving.

[0003]

By the way, in the conventional apparatus, it is possible to issue an alarm in the situation of high urgency, as well as a so-called gray zone in which the degree of danger is hidden in normal driving. Under such circumstances, for example, if the driver does not notice himself, from an objective point of view, the distance between the vehicles is too short and it is a dangerous situation, sudden acceleration and sudden deceleration are frequently performed, and dangerous driving that easily leads to accidents It is possible to issue an alarm even in the situation where is performed.

However, there is a problem that it is extremely troublesome to issue an alarm even in such a case.

[0005] It is an object of the present invention to provide a safe driving evaluation device capable of prompting safe driving by accurately evaluating the contents of such driving and making the driver aware of the evaluation.

[0006]

According to the first aspect of the present invention, there is provided a driver state detecting means for detecting a driver state, a vehicle state detecting means for detecting a driving state of the own vehicle, and a driving environment around the own vehicle. At least one of driving environment detecting means for detecting, a driving evaluation means for evaluating the contents of driving based on the detection information of the detecting means, and an output for causing the driver to recognize the evaluation result of the driving evaluating means. Evaluation output means is provided.

According to a second aspect of the present invention, there is provided the safe driving evaluation apparatus according to the first aspect, wherein the driver state detecting means inputs a driver's face image and calculates the position of the driver's eyes from the input image. And determining whether or not the driver is gazing forward from the position of the eyes, and the driving evaluation means determines whether the driver is gazing at the front based on whether or not the driver is gazing forward. A safety evaluation device for performing the above-mentioned evaluation according to the frequency of viewing the information.

According to a third aspect of the present invention, there is provided the safety driving evaluation device according to the first aspect, wherein the vehicle state detecting means detects a speed of the own vehicle, and the traveling environment detecting means detects the own vehicle and a preceding vehicle. The driving evaluation means detects the relative speed and the inter-vehicle distance between the host vehicle and the detected vehicle speed, the relative speed between the own vehicle and the preceding vehicle, and the inter-vehicle distance based on the detected self-vehicle speed. The above-mentioned evaluation is performed according to the frequency of approach.

According to a fourth aspect of the present invention, there is provided the safe driving evaluation device according to the first aspect, wherein the driver state detecting means inputs a driver's face image and calculates the position of the driver's eyes from the input image. The driving environment detecting means detects whether the driver is gazing forward from the position of the eyes, and detects the own vehicle speed, the relative speed between the own vehicle and the preceding vehicle, and the inter-vehicle distance. The driving evaluation means performs the evaluation in accordance with the frequency at which the own vehicle is approaching the preceding vehicle at a distance shorter than the safe inter-vehicle distance and the driver looks other than ahead.

According to a fifth aspect of the present invention, in the safety driving evaluation device according to the first aspect, the vehicle state detecting means detects longitudinal acceleration of the vehicle, and the driving evaluating means detects the detected longitudinal direction. The evaluation is performed according to the number of times the acceleration exceeds a reference value.

According to a sixth aspect of the present invention, in the safety driving evaluation apparatus according to the first aspect, the vehicle state detecting means detects a stepping speed and a stepping amount of an accelerator pedal, and the driving evaluating means detects The evaluation is performed according to the stepping speed and stepping amount of the accelerator pedal.

According to a seventh aspect of the present invention, in the safe driving evaluation device according to the first aspect, the vehicle state detecting means detects a speed of the own vehicle, and the driving environment detecting means detects the speed of the own vehicle navigation device. Recognizing the speed limit of the traveling road, the driving evaluation means performs the evaluation according to the frequency at which the detected vehicle speed exceeds the recognized speed limit.

According to an eighth aspect of the present invention, in the safe driving evaluation apparatus according to the seventh aspect, the vehicle state detecting means detects a distance of the vehicle traveling beyond a speed limit, and the driving evaluating means includes: The evaluation is performed according to the distance traveled beyond the speed limit.

According to a ninth aspect of the present invention, in the safe driving evaluation device according to the seventh or eighth aspect, the driving environment detecting means includes:
A raindrop is detected, and the driving evaluation means sets the speed limit low by detecting the raindrop.

According to a tenth aspect of the present invention, in the safe driving evaluation device according to the seventh or eighth aspect, the driving environment detecting means detects day and night based on the amount of light, and the driving evaluating means detects the daytime and nighttime. The speed limit is set low.

According to an eleventh aspect of the present invention, in the safety driving evaluation device according to the first aspect, the vehicle state detecting means detects a lateral acceleration of the own vehicle, and the driving evaluating means detects the lateral acceleration detected. It is characterized in that the evaluation is performed according to the acceleration.

According to a twelfth aspect of the present invention, in the safe driving evaluation device according to any one of the first to eleventh aspects, the evaluation output means outputs the evaluation as an image.

According to a thirteenth aspect of the present invention, in the safe driving evaluation device according to any one of the first to eleventh aspects, the evaluation output means outputs the evaluation on a recording sheet.

A fourteenth aspect of the present invention is the safe driving evaluation device according to any one of the first to eleventh aspects, wherein the evaluation output means outputs the evaluation by voice.

According to a fifteenth aspect of the present invention, there is provided the safe driving evaluation device according to any one of the first to fourteenth aspects, wherein the vehicle state detecting means detects the end of driving of the own vehicle, and the evaluation output means includes: Is output at the end of the detected operation.

A sixteenth aspect of the present invention is the safe driving evaluation device according to the fifteenth aspect, wherein the vehicle state detecting means detects the end of driving of the own vehicle by key-off.

According to a seventeenth aspect of the present invention, in the safe driving evaluation device according to the fifteenth aspect, the vehicle state detecting means detects the end of driving of the own vehicle based on a position of an operation lever of the transmission and a position of a parking lever. It is characterized by doing.

The invention according to claim 18 is the safe driving evaluation device according to any one of claims 1 to 14, wherein the vehicle state detecting means detects the start of driving of the own vehicle, and the evaluation output means In addition, at the start of the detected operation, the evaluation of the previous operation is output.

A nineteenth aspect of the present invention is the safe driving evaluation device according to the eighteenth aspect, wherein the vehicle state detecting means detects the start of operation of the own vehicle by starting the engine.

According to a twentieth aspect of the present invention, there is provided a safe driving evaluation device according to any one of the first to nineteenth aspects, wherein the evaluation output means stores a past evaluation result, and stores the past evaluation result and a new evaluation result. The method is characterized by comparing the result with the result and outputting the tendency of the evaluation result.

[0026]

According to the first aspect of the present invention, the driving content is evaluated and output based on at least one of the detection information of the driver's state, the driving state of the own vehicle, and the driving environment around the own vehicle. This allows the driver to recognize the vehicle, and when driving with a low degree of safety, the driver can be prompted to drive safely.

According to the second aspect of the present invention, in addition to the effects of the first aspect, when the driver is performing inattentive driving, this is evaluated to recognize the inattentive driving during driving, and to promote safe driving. be able to.

According to the third aspect of the present invention, in addition to the effect of the first aspect of the present invention, when the own vehicle is driving with a high possibility of colliding with the preceding vehicle, this is evaluated and the driver is made aware of it. It can encourage safe driving.

According to the fourth aspect of the present invention, in addition to the effect of the first aspect of the present invention, when the driver is likely to collide with the preceding vehicle and frequently performs inattentive driving, the driver is evaluated and evaluated. And promote safe driving.

According to the fifth aspect of the present invention, in addition to the effects of the first aspect of the present invention, when sudden acceleration or sudden deceleration is frequently performed, this is evaluated and made to be recognized by the driver, and safe driving is performed. Can be encouraged.

According to the sixth aspect of the invention, in addition to the effects of the first aspect, the operation is performed by evaluating that the accelerator pedal depression speed and the depression amount exceed the set values, that is, that the accelerator work is rough. It can make people aware and encourage safe driving.

According to the seventh aspect of the present invention, when the vehicle speed frequently exceeds the speed limit, the speed can be evaluated and made to be recognized by the driver, thereby encouraging safe driving.

According to the eighth aspect of the present invention, in addition to the effect of the seventh aspect of the present invention, when the proportion of the distance that the vehicle travels beyond the speed limit is high, this is evaluated and made to be recognized by the driver, and the safety is improved. Driving can be encouraged.

According to the ninth aspect of the invention, in addition to the effects of the seventh or eighth aspect, in the case of rainy weather, the speed limit can be set low, and safe driving can be encouraged in the case of rainy weather.

According to the tenth aspect, in addition to the effects of the seventh or eighth aspects, the speed limit can be set low in the case of nighttime to promote safer driving.

According to the eleventh aspect of the present invention, in addition to the effects of the first aspect of the present invention, when the vehicle is traveling at a high speed due to a high lateral acceleration and the vehicle is traveling at a high speed, the driver is recognized and encouraged to drive safely. Can be.

According to the twelfth aspect of the present invention, in addition to the effects of any one of the first to eleventh aspects of the present invention, the driver can easily recognize a vehicle interior monitor or the like by the evaluation based on the image output, thereby promoting safe driving. be able to.

According to the thirteenth aspect, in addition to the effects of any one of the first to eleventh aspects, the evaluation can be reconfirmed at any time by carrying around the recording paper by outputting the evaluation on the recording paper. It can encourage safe driving.

According to the fourteenth aspect, in addition to the effects of any one of the first to eleventh aspects, it is possible to easily recognize the evaluation by outputting the evaluation by voice, and to promote safe driving. it can.

According to the fifteenth aspect, in addition to the effect of any one of the first to fourteenth aspects, by outputting the evaluation at the end of driving, it is possible to immediately recognize the evaluation of the driver's own driving and to safely drive. Can be encouraged.

According to the sixteenth aspect, in addition to the effects of the fifteenth aspect, the evaluation can be output at the time of key-off, the self-evaluation of the driving at the end of driving can be recognized, and the safe driving can be promoted. Can be.

According to the seventeenth aspect, in addition to the effect of the fifteenth aspect, the position of the operation lever of the transmission, for example, the shift lever position is neutral in the case of a manual transmission, and the select lever is in the parking position in the case of an automatic transmission. According to a certain state and a position of a parking lever, for example, a state where a parking brake is applied, an evaluation can be output, and at the end of driving, an evaluation of own driving can be recognized, and safe driving can be promoted. it can.

According to the eighteenth aspect of the present invention, in addition to the effects of any one of the first to fourteenth aspects, an evaluation can be output at the start of driving, and the driver can evaluate his / her own driving when he / she is about to drive. Can be recognized, and safe driving can be encouraged.

According to the nineteenth aspect, in addition to the effects of the eighteenth aspect, an evaluation can be output when the engine is started, and safe driving can be encouraged.

According to the twentieth aspect, in addition to the effect of any one of the first to nineteenth aspects, a chronological tendency of the evaluation result can be output, and safer driving can be promoted.

[0046]

FIG. 1 is a block diagram showing the configuration of a safe driving evaluation device according to the present invention.

As shown in FIG. 1, in the safe driving evaluation device, the safe driving evaluation means 1 inputs information from the driver state detecting means 3, the vehicle state detecting means 5, and the driving environment detecting means 7, and outputs the evaluation output means 9. Output.

The driver state detecting means 3 detects a driver's inattentive state, for example, and outputs a signal. The vehicle state detecting means 5 detects the driving state of the own vehicle, for example, the speed, acceleration and deceleration of the own vehicle, and outputs a signal. The traveling environment detecting means 7
Is designed to detect and output a traveling environment around the own vehicle, for example, an inter-vehicle distance to a preceding vehicle traveling ahead, whether or not the vehicle is on an expressway, whether or not it is raining, and the like.

The operation evaluation means 1 comprises detection means 3,
The detection information of 5 and 7 is input, and the content of the driving of the driver is evaluated based on a predetermined standard. The evaluation output means 9 outputs the evaluation result of the driving evaluation means 1 so that the driver can recognize the evaluation result. For example, the evaluation output means 9 outputs an image on a monitor of a driver's seat in a vehicle interior, outputs the image on a recording sheet, or outputs a voice. Output.

Accordingly, when the driver detects inattentive driving or the like based on the information from the driver state detecting means 3, when the vehicle is driven by the vehicle state detecting means 5 exceeding the speed limit, or when the vehicle is suddenly decelerated. When sudden acceleration is repeated, or when the driving environment detecting means 7 drives the vehicle in a state in which the distance between the vehicle and the preceding vehicle is short and there is a danger of collision, the driving evaluation means 1 determines the content of the driving. Is evaluated as low, and the evaluation is output by the evaluation output means 9. This output is performed, for example, at the end of driving due to engine key-off or at the start of driving, and can be recognized by the driver to encourage the driver to drive safely.

(First Embodiment) FIG. 2 shows an embodiment of the driving vehicle state detecting means 3. In this embodiment, the driver state detecting means 3 inputs a driver's face image. Detecting the position of the driver's eyes from the input image and determining whether the driver is gazing forward from the position of the eyes, and determining whether the driver is gazing forward. The evaluation is performed according to the frequency with which the driver looks other than ahead based on the determination.

In other words, a TV camera 13 for photographing the driver's face from the front is provided in the vehicle interior instrument 11 for inputting the driver's face image. The input image of the TV camera 13 is converted into a digital amount of input image data via the AD converter 15 and stored in the image memory 1.
7 is stored. The stored digital amount of input image data is processed by the image data calculation circuit 19.

That is, the detection of the density of the pixel row and the extraction of the points of the pixel row are performed, and the points in the horizontal direction of the face are successively extracted from the points adjacent to each other in the pixel row direction.

Next, the facial feature value recognition circuit 21 specifies the eye feature value from the plurality of extracted curve data and detects the eye position data. Furthermore, the inattentiveness detection circuit 2
In 3, the reference value of the eye is determined from the feature value of the eye, and it is determined whether or not the driver is gazing forward in accordance with the amount of movement of the eye from the reference value, and output to the driving evaluation means 1. It is.

FIG. 3 is a diagram showing a face image of the driver's eyes and eyebrows. Reference numeral 25 denotes an outer frame of the screen, 27 denotes a driver's eyebrows, and 29 denotes eyes.

FIG. 4 is a diagram in which each of the extracted points of the eyes or eyebrows is grouped by performing image processing on the extracted points. 31
a and 31b are group data corresponding to eyebrows.
33a and 33b are group data (curve data) corresponding to the eyes. Reference numeral 35 denotes an area for capturing the eyes and eyebrows by image processing and determining a state of gaze ahead (hereinafter, a window).
It is. The size of this window is made larger than the minimum size in which the eyes and eyebrows can enter in the front gaze state in consideration of the amount of movement due to vibration during traveling.

Next, a method of determining whether the driver is gazing forward or not will be described.

FIG. 5 shows a processed image when looking at the vicinity of the center corsor from a state in which the user gazes forward. The data of the eyes and eyebrows move largely in the lower left direction and disappear from the window 35. This window 35
It is determined that the user is not gazing forward when a predetermined period of time has elapsed after the data of the eyes or eyebrows disappears or the number of data has decreased.

FIG. 6 shows an example of data obtained by taking a time frequency during which the driver does not gaze ahead during normal driving on a general road. In this result, the frequency is concentrated around one second, and the predetermined time is set to a value larger than this one second, for example, 1.5 seconds. Therefore, when the data of the eyes and eyebrows disappears from the front window 35, or when 1.5 seconds have elapsed since the number of data has decreased, it is determined that the user is not gazing forward.

Next, the operation of the first embodiment will be described with reference to the flowchart of FIG.

First, when this flow is executed, a vehicle speed signal is input in step S11 (hereinafter, simply referred to as S11; other steps are the same). In S12, the traveling distance is calculated from the vehicle speed and time. In step S13, information as to whether or not the user is gazing at the front, which is detected as described above, that is, a signal as to whether or not the driver is looking aside is read. In S14, the number of inattentive driving during running is counted. In S15, it is determined whether or not the ignition key is OFF, and if the ignition key is not OFF, S11 is executed.
The following steps are repeated.

If the ignition key is OFF, it is considered that the operation has been completed, and the flow shifts to S16. S1
In No. 6, the number of inattentive occurrences per mileage (N _W / S)
Is calculated, and the operation content is evaluated and determined in S17. The evaluation is output as a result display in S18, and the evaluation output means 9 performs image display, recording paper, or audio output.

FIG. 8 shows the relationship between the number of inattentive appearances and the score (evaluation). As shown in FIG. 8, the score is lowered when there is a lot of inattentive driving, and the rating is 0 to −5.
Therefore, after the driving by the key-off, the driver recognizes the evaluation of such driving contents with images, voices, recording paper, etc., thereby encouraging the driver to reflect on his own inattentive driving and encouraging safe driving in the next driving. Can be.

In other words, the more inattentive driving is, the less safe driving is. Therefore, by making the driver aware of this, correction of driving is encouraged, and safe driving can be improved.

(Second Embodiment) FIG. 9 shows an embodiment for detecting information of the vehicle state detecting means 5 and the traveling environment detecting means 7 of FIG. 1, and the vehicle state detecting means 5 detects the speed of the own vehicle. Then, the driving environment detecting means 7 detects the relative speed and the inter-vehicle distance between the own vehicle and the preceding vehicle, and the driving evaluation means 1 calculates the relative speed and the inter-vehicle distance from the detected own vehicle speed, the relative speed between the own vehicle and the preceding vehicle, and the inter-vehicle distance. The above evaluation is performed according to the frequency with which the vehicle approaches the preceding vehicle at a distance shorter than the safe inter-vehicle distance. In other words, FIG. 9 evaluates safe driving by catching that the inter-vehicle distance is short and the vehicle approaches a safer inter-vehicle distance. In FIG. 9, a radar sensor 4 is used as an inter-vehicle distance detecting device.
1 shows a relationship between the own vehicle 43 provided with No. 1 and a preceding vehicle 45 located at a distance L between the vehicles. The inter-vehicle distance L is calculated from the time when the laser is emitted from the radar sensor 41 to the front and reflected by the reflector of the preceding vehicle 45 to return.

FIG. 10 is a graph showing the relationship between the vehicle speed and the inter-vehicle distance. When the inter-vehicle distance is sufficient with respect to the vehicle speed, it is the safety area (A), and the distance from the preceding vehicle 45 is reduced. The area where the inter-vehicle distance must be ensured by braking (B)
The area where the inter-vehicle distance needs to be secured immediately is defined as (C). In this example, the relative speed is 0, and when the relative speed is present and the inter-vehicle distance is reduced, the slope of the graph is further increased. The safe inter-vehicle distance means that the vehicle is in the safety area A in FIG.
Means the distance between vehicles.

FIG. 11 shows a flowchart of this embodiment. When this flowchart is executed, S
At 11, a vehicle speed signal of the own vehicle is input. In S21, a signal of the following distance detected by the laser radiation from the radar sensor 41 is input. In S22, it is determined whether or not the inter-vehicle distance is in the safety area A. If it is determined that it is in the safety area A, the process proceeds to S23, and the score is set to 0.

If it is determined in S22 that the inter-vehicle distance is not in the safe area A, the process proceeds to S24, and it is determined whether or not the inter-vehicle distance is in the B area. If it is in the area B, the process proceeds to S25, and the score is determined to be -2. If it is determined in step S24 that the vehicle is not in the area B, the process proceeds to step S26.
Then, it is determined that the following distance is in the area C, and
Is determined to be -4.

Then, in S15, it is determined whether or not the key switch is off. If the key is off, it is determined that the operation is finished. In S28, the evaluation result is output, and the evaluation output means 9 outputs the evaluation result in the same manner as described above. You.

Therefore, also in this case, the driver can recognize that the inter-vehicle distance is insufficient in his / her driving by looking at the output of the evaluation result, and can perform safe driving by increasing the inter-vehicle distance in the next driving. Can be encouraged.

(Third Embodiment) In this embodiment, the driver state detecting means 3 shown in FIG. 1 inputs a driver's face image, detects the position of the driver's eyes from the input image, and From the position of the eyes, it is determined whether or not the driver is gazing forward, and the traveling environment detecting means 7 detects the own vehicle speed, the relative speed between the own vehicle and the preceding vehicle, and the inter-vehicle distance. Means 1 performs the evaluation according to the frequency at which the host vehicle is approaching the preceding vehicle at a distance shorter than the safe inter-vehicle distance, and the driver looks other than ahead.

FIG. 12 is a flowchart according to the third embodiment. When this flowchart is executed, first, in S21 and S31, the vehicle speed signal,
An inter-vehicle distance, a signal, and the number of inattentive times M are input. In S22, it is determined whether the current inter-vehicle distance is in the area A as in the second embodiment. If it is in the A area, the score is 0 in S23.
Is determined. If it is determined in S22 that the inter-vehicle distance is not within the area A, the process proceeds to S24, and it is determined whether or not the vehicle is in the area B. If it is in the area B, the process proceeds to S32, and if not, the process proceeds to S26.

At S32, the presence or absence of inattentiveness is determined.
If it is determined that the side is not considered, the process proceeds to S34, and the score is determined to be −2. If it is determined that there is inattention in S32,
In S35, the score is determined to be -3. If it is determined that the inter-vehicle distance is not in the area B in S24, the inter-vehicle distance is recognized as C in S26, and the process proceeds to S33.
The presence or absence of inattentiveness is determined.
If the score is determined to be -4 at 6, and it is determined that there is inattentiveness,
In S37, the score is determined to be -5.

At S15, the key switch is turned off,
If the operation end state is determined, the result of the score is displayed in S38. This display is as described with reference to FIG. 1. From the state where the inter-vehicle distance is sufficient and the driver does not look aside to the state where the inter-vehicle distance is insufficient and the driver is driving aside, the display is as described in FIG. 1. By recognizing such self-driving, it is possible to encourage driving aiming at a score of 0 in the next driving, thereby improving safe driving.

(Fourth Embodiment) FIGS. 13 to 15 show a fourth embodiment. In the present embodiment, the vehicle state detection means 5 of FIG. 1 detects the longitudinal acceleration of the vehicle, and the driving evaluation means 1 performs the evaluation according to the number of times the detected longitudinal acceleration exceeds a reference value. It is.

FIG. 13 shows a flowchart of the fourth embodiment. In S11, S12, and S41, information on the vehicle speed signal, the traveling distance, and the longitudinal acceleration (hereinafter, longitudinal G) is read. In S42, the gear position is read.
In S43, it is determined whether or not the front and rear G exceeds a threshold. If the front and rear G exceed the threshold, the number of times that the front and rear G exceeds a set value, that is, the number of sudden starts _{Ng +} or a sudden deceleration N per unit traveling distance. _g- is counted, and the process proceeds to S15.

If it is determined in S43 that the front and rear G does not exceed the threshold value, the flow shifts to S15. S15
Then, it is determined whether or not the ignition key is off, and if not, the above steps are repeated.

If it is determined in S15 that the ignition key is turned off, it is determined that the operation has been completed, and the flow shifts to S45 to calculate the number of sudden starts and rapid decelerations per unit traveling distance. In S46, a score is determined, and in S47
, The result is displayed.

FIG. 14 shows the threshold value in S43. The waveforms before and after G are shown vertically, with the plus side indicating acceleration and the minus side indicating deceleration. The threshold value is set as shown by the dotted line. On the plus side, the generated acceleration changes at the gear position, so the threshold value is changed for each gear position. Also, the deceleration threshold is clearly greater than the acceleration threshold. The threshold value is determined by, for example, setting the acceleration / deceleration G of the 10-mode fuel consumption as a standard and setting this as the threshold value.

FIG. 15 (a) shows the relationship between the number of sudden starts Ng ₊ and the score for a unit traveling distance, and FIG. 15 (b) shows the relationship between the number of sudden decelerations _Ng- and the score. As shown in FIG. 15, as the number of sudden starts and the number of sudden decelerations with respect to the unit traveling distance increase, the score is lowered, and a five-level evaluation from minus 5 is performed.

Then, the driver knows the score by displaying the result, and can urge the driver to make the score close to 0 in the next driving.

When the depressing speed and the depressing amount of the accelerator pedal exceed the set values instead of the front and rear G signals,
That is, it is possible to adopt a configuration in which the evaluation is reduced as the accelerator work becomes rough.

(Fifth Embodiment) FIGS. 16 to 18 show a fifth embodiment. In this embodiment, a state in which the vehicle runs at a speed exceeding the speed limit is evaluated to evaluate safe driving. That is, in the present embodiment, the vehicle state detecting means 5 of FIG. 1 detects the vehicle speed of the own vehicle, and the running environment detecting means 7 recognizes the speed limit of the running road from the own vehicle navigation device. Then, the driving evaluation means 1 lowers the evaluation when the frequency at which the detected vehicle speed exceeds the recognized speed limit exceeds a set value.

When the flowchart of FIG. 16 is executed, S
At 11, a vehicle speed signal is input. In S12, the traveling distance S
Is calculated and the value is taken. In S51, the speed limit of the currently running road is acquired from the road information of the navigation device. In S52, a threshold value of the speed limit is set (set value). In S53, it is determined whether the vehicle speed exceeds a threshold.

If it is determined in step S53 that the threshold value is not exceeded, the process proceeds to step S15. If it is determined that the threshold value is exceeded, step S15 is performed.
Move to 54. In S54, the distance _So running over the threshold is calculated. In S55, a value is calculated by dividing the distance _So that ran beyond the threshold value by the total traveling distance S. S
At 15, it is determined whether or not the ignition key is off,
If it is not off, the process returns to S11 and the above steps are repeated. If it is determined that the ignition key is turned off, the operation is considered to be terminated, and the score is determined in S56. In S57, a display of the evaluation result is output.

FIG. 17 shows the relationship between the traveling distance and the vehicle speed. As shown in FIG.
The allowable range is given as an increase of 0 km / h. Based on FIG. 17, it is determined whether the vehicle speed in S53 is equal to or lower than the threshold value.

FIG. 18 shows the relationship between S _o / S and the score. The higher the S _o / S, the lower the evaluation, and a five-stage display. Such a display is output in S57. Accordingly, the score decreases as the ratio of the distance traveled beyond the speed limit to the total travel distance increases, and the driver recognizes this by the evaluation output means 9 at the end of driving, so that the speed limit is maintained in the next driving. Can be encouraged.

In the present embodiment, the driving evaluation means 1 performs the evaluation in accordance with the ratio of the traveling distance exceeding the speed limit to the total traveling distance. However, the detected own vehicle speed exceeds the speed limit. The evaluation may be performed according to the frequency and the number of times.

(Sixth Embodiment) FIGS. 19 and 20 show a sixth embodiment.
According to the present embodiment, in the present embodiment, the threshold value of the speed limit of the fifth embodiment is determined based on whether the road surface is dry or not, and is changed accordingly. That is, the traveling environment detecting means 7 in FIG. 1 detects raindrops, and the driving evaluation means 1 sets the speed limit in the fifth embodiment low by detecting the raindrops.
This will be described with reference to the flowchart of FIG.

The flowchart of FIG. 19 differs from the flowchart of FIG. 16 of the fifth embodiment in steps S61 to S66. That is, in S61, the signal of the raindrop detection sensor is input. This raindrop detection sensor is attached to the outside of the vehicle, and when it rains and hits raindrops, it detects the vibration and outputs a signal of 1 if it is raining and 0 if it is not raining. ing. S62
If the output of the signal from the raindrop detection sensor is 0, the road surface is determined to be dry, and the process proceeds to S52. Hereinafter, S5
The processes up to 3, S54 and S55 correspond to S52, S53, S54 and S55 in FIG. 16 of the fifth embodiment.

If the weather is rainy and the output of the raindrop detection sensor is 1, the flow shifts to S62 to S63, and in S63, the speed limit is reset in the direction of decreasing the threshold value. S6
At 4, it is determined whether or not the vehicle speed has exceeded the threshold value in rainy weather. If not, the process proceeds to S15, and if it has, the process proceeds to S65. In S65, the distance _Sow traveled beyond the threshold value in rainy weather is calculated. In step S66, a value obtained by dividing the distance _Sow traveled beyond the threshold value in rainy weather by the total travel distance S is stored. As described above, if the speed is not reduced during rainy weather, _Sow / S is increased and the score is set so as to decrease.

Hereinafter, the processing of S15, S56 and S57 is as follows.
This corresponds to S15, S56, and S57 in FIG. 16 of the fifth embodiment. In addition, S11, S12, and S51 correspond to FIG.
6 correspond to S1, S12, and S51.

FIG. 20 shows the threshold value of the sixth embodiment. The threshold value is set to a value which is about 25% lower than the speed limit. This allows the driver to recognize the evaluation in rainy weather where slippage is likely to occur, and to encourage safe driving such that the speed limit is reduced by 25% or more in the next rainy weather.

It should be noted that, as in the case of rainy weather, excessively high speeds are dangerous at night, so the speed limit in the fifth embodiment is preferably set low. Therefore, the driving environment detecting means 7 shown in FIG.
The evaluation is performed with the speed limit set low by night detection. That is, the traveling environment detecting means 7 detects day and night by the light amount sensor which outputs 1 when the surroundings are dark. As a result, it is possible to accurately evaluate the driving during night driving, make the driver recognize this, and urge the driver to limit the speed at the time of driving the next night.

(Seventh Embodiment) FIGS. 21 to 23 show a seventh embodiment.
1 shows an embodiment. In the present embodiment, the evaluation is performed according to the increase in the lateral acceleration of the vehicle. That is, the vehicle state detecting means 5 in FIG. 1 detects the lateral acceleration of the own vehicle, and the driving evaluation means 1 performs the evaluation according to the state of the detected lateral acceleration. The detection of the lateral G by the vehicle state detecting means 5 can be detected by a lateral G sensor, or can be estimated from the steering angle and the vehicle speed.

This will be described with reference to the flowchart of FIG. 21. First, in S11, S12, and S71, information on the vehicle speed signal, the traveling distance S, and the lateral acceleration (lateral G) are fetched.
In S72, it is determined whether or not the lateral G has exceeded the threshold. If it is determined that the horizontal G has exceeded the threshold, the process proceeds to S73,
If it is determined that the value does not exceed the threshold value, the process proceeds to S15.

In S73, the number of times N _{gx in} which the lateral G exceeds the threshold value is counted. In S15, it is determined whether or not the ignition key is off. If not, the process returns to S11,
The above steps are repeated. If it is determined that the ignition key is turned off, it is determined that the operation has been completed, and S7
Move to 4. In S74, the number of times N _gx / S exceeding the threshold value per unit traveling distance is calculated. In S75, the score is determined according to the number of times exceeding the threshold, and in S76, the result is displayed, that is, the evaluation is output by the evaluation output means 1.

FIG. 22 shows the threshold value of the horizontal G.
The horizontal axis shows the traveling distance S, the upper side of the vertical axis shows the side G when turning right, and the lower side shows the side G when turning left. And the threshold value at the time of left-right turning is shown up and down, respectively. The guideline of the threshold value of the lateral G is, for example, G generated when the vehicle travels on a curved portion exceeding the design speed of the road.

FIG. 23 shows the determination of the score in S75. The score decreases as the number _Ng / S of passing through the lateral G exceeding the threshold without deceleration before the curve or the intersection increases, The five-stage display up to minus 5 is performed. By displaying this evaluation by the evaluation output means 9 at the end of driving, the driver can evaluate driving at a curve or an intersection, and can encourage decelerated driving at a curve or an intersection at the next driving.

FIG. 24 shows an embodiment of the result display. In the present embodiment, the evaluation results of the above-described embodiments are collectively displayed on a radar chart. According to such a display, it is understood that safer driving is performed as the area surrounded by the broken line in the figure is larger, and dangerous driving is performed when the area is smaller. By looking at this, the driver can confirm his / her own driving, can clearly recognize where to pay attention to the next driving, and can perform safer driving.

In the above embodiments, the result is displayed after the key is turned off. However, even if the key is turned off, power is supplied to the controller until the result is displayed. I will not do it.

In addition, the configuration may be such that the evaluation is output not only at the end of the operation but also at the start of the operation. That is, the vehicle state detecting means 5 may detect the start of driving of the own vehicle, and the evaluation output means 9 may output the evaluation of the previous driving at the time of the detected driving start. Specifically, the vehicle state detecting means 5 detects the start of operation of the own vehicle by starting the engine, that is, by turning on the ignition switch, and in response to this, the evaluation output means 9 displays the image, recording paper, or voice during the previous operation. The output of the evaluation is made. Thereby, each time the operation is started, the previous operation evaluation can be recognized every time, and even if the previous evaluation is not stored, by confirming this at the time of operation start, safe driving can be more clearly promoted. .

Further, the evaluation output means 9 not only outputs the evaluation of the previous operation but also stores the past evaluation results, compares the past evaluation results with the new evaluation results, and outputs the tendency of the evaluation results. Configuration. By outputting the evaluation results over time, it is possible to clearly recognize whether or not the driver's own operation has shifted to a safe side or a dangerous side for each operation, and to encourage safer driving. is there.

[Brief description of the drawings]

FIG. 1 is a configuration block diagram of the present invention.

FIG. 2 is a block diagram according to the first embodiment of the present invention.

FIG. 3 is an explanatory diagram of a face image of eyes and eyebrows according to the first embodiment of the present invention.

FIG. 4 is an explanatory diagram after the image processing of FIG. 3;

FIG. 5 is an explanatory diagram showing a processed image when viewing the vicinity of a center console;

FIG. 6 is a graph showing time oscillations when the user is not gazing forward;

FIG. 7 is a flowchart of the first embodiment of the present invention.

FIG. 8 is a graph showing the relationship between the number of inattentive occurrences and the score.

FIG. 9 is an explanatory diagram showing detection of an inter-vehicle distance.

FIG. 10 is a graph showing a relationship between a vehicle speed and an inter-vehicle distance.

FIG. 11 is a flowchart according to a second embodiment of the present invention.

FIG. 12 is a flowchart according to a third embodiment of the present invention.

FIG. 13 is a flowchart according to a fourth embodiment of the present invention.

FIG. 14 is a graph showing front and rear G waveforms during running.

15A and 15B show the relationship between the number of times exceeding the threshold value and the score, wherein FIG. 15A is a graph for acceleration and FIG. 15B is a graph for deceleration.

FIG. 16 is a flowchart according to a fifth embodiment of the present invention.

FIG. 17 is a graph showing a relationship between a traveling distance and a vehicle speed.

FIG. 18 is a graph showing the relationship between the percentage of the distance traveled beyond the speed limit relative to the total travel distance and the score.

FIG. 19 is a flowchart according to a sixth embodiment.

FIG. 20 is a graph showing a relationship between a traveling distance and a vehicle speed.

FIG. 21 is a flowchart according to a sixth embodiment.

FIG. 22 is a graph showing a relationship between a traveling distance and a lateral G.

FIG. 23 is a graph showing the relationship between the number of times exceeding the threshold value of the horizontal G and the score.

FIG. 24 is an explanatory diagram showing an embodiment of a result display.

[Description of Signs] 1 Driving evaluation means 3 Driver state detection means 5 Vehicle state detection means 7 Driving environment detection means 9 Evaluation output means 13 TV camera (Driver state detection means) 15 AD converter (Driver state detection means) 17 Image Memory (Driver State Detecting Means) 19 Image Data Calculation Circuit (Driver State Detecting Means) 21 Facial Feature Recognition Circuit (Driver State Detecting Means) 23 Inattentive Detecting Circuit (Driver State Detecting Means) 41 Radar Sensor (Driving environment detecting means) 43 own vehicle 45 preceding vehicle

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3D037 FA01 FA05 FA10 FA13 FA23 FA24 FA27 FB09 FB10 5H180 AA01 CC04 EE13 LL01 LL04 LL07 LL08 LL15

Claims (20)

[Claims] 1. A driving state detecting means for detecting a driving state of a vehicle, a vehicle state detecting means for detecting a driving state of the own vehicle, and a driving environment detecting means for detecting a driving environment around the own vehicle. At least comprising: a driving evaluation unit that evaluates the content of driving based on the detection information of the detection unit; and an evaluation output unit that outputs the evaluation result of the driving evaluation unit so that the driver recognizes the evaluation result. Safe driving evaluation device. 2. The safe driving evaluation device according to claim 1, wherein the driver state detecting means inputs a driver's face image, detects a driver's eye position from the input image, and detects the driver's eye position. From the position of the eyes, determine whether the driver is gazing forward or not, the driving evaluation means according to the frequency of the driver looking other than forward based on the determination of whether or not gazing forward. A safe driving evaluation device characterized by performing the above-mentioned evaluation. 3. The safe driving evaluation device according to claim 1, wherein the vehicle state detecting unit detects a speed of the own vehicle, and the traveling environment detecting unit determines a relative speed between the own vehicle and a preceding vehicle. The driving evaluation means detects the inter-vehicle distance, and determines the frequency at which the self-vehicle approaches the preceding vehicle to a distance shorter than the safe inter-vehicle distance from the detected own vehicle speed, the relative speed between the own vehicle and the preceding vehicle, and the inter-vehicle distance. A safe driving evaluation device, wherein the evaluation is performed in accordance with the evaluation. 4. The safe driving evaluation device according to claim 1, wherein the driver state detecting means inputs a driver's face image, detects a driver's eye position from the input image, and detects the driver's eye position. The driving environment detecting means determines whether or not the driver is gazing forward from the position of the eyes, and detects the own vehicle speed, the relative speed between the own vehicle and the preceding vehicle, and the inter-vehicle distance, and performs the driving evaluation. The safe driving evaluation device is characterized in that the evaluation is performed according to the frequency at which the own vehicle is approaching the preceding vehicle at a distance shorter than the safe inter-vehicle distance and the driver looks at something other than ahead. 5. The safe driving evaluation device according to claim 1, wherein the vehicle state detecting means detects a longitudinal acceleration of the vehicle, and the driving evaluating means determines that the detected longitudinal acceleration is a reference value. A safe driving evaluation device, wherein the evaluation is performed according to the number of times that the number has exceeded. 6. The safe driving evaluation device according to claim 1, wherein the vehicle state detecting means detects a depression speed and a depression amount of an accelerator pedal, and the driving evaluation means detects the detected depression of the accelerator pedal. A safe driving evaluation device, wherein the evaluation is performed according to a speed and a stepping amount. 7. The safe driving evaluation device according to claim 1, wherein the vehicle state detecting means detects a speed of the own vehicle, and the driving environment detecting means detects a speed limit of a driving road from the own vehicle navigation device. A safe driving evaluation device, wherein the driving evaluation unit performs the evaluation according to a frequency at which the detected own vehicle speed exceeds the recognized speed limit. 8. The safe driving evaluation device according to claim 7, wherein the vehicle state detecting means detects a distance of the vehicle traveling beyond a speed limit, and the driving evaluation means exceeds the speed limit. A safe driving evaluation device for performing the evaluation according to a traveling distance. 9. The safe driving evaluation device according to claim 7, wherein the driving environment detection means detects raindrops, and the driving evaluation means sets the speed limit low by detecting the raindrops. A safe driving evaluation device characterized in that: 10. The safe driving evaluation device according to claim 7, wherein the driving environment detecting unit detects day and night based on a light amount, and the driving evaluating unit lowers the speed limit by detecting the night time. A safe driving evaluation device characterized by setting. 11. The safe driving evaluation device according to claim 1, wherein the vehicle state detecting means detects a lateral acceleration of the own vehicle, and the driving evaluating means determines the lateral acceleration in accordance with the detected lateral acceleration. A safe driving evaluation device characterized by performing an evaluation. 12. The safe driving evaluation device according to claim 1, wherein the evaluation output unit outputs the evaluation as an image. 13. The safe driving evaluation device according to claim 1, wherein the evaluation output means outputs the evaluation on a recording sheet. 14. The safe driving evaluation device according to claim 1, wherein the evaluation output means outputs the evaluation by voice. 15. The safe driving evaluation device according to claim 1, wherein the vehicle state detecting means detects an end of driving of the own vehicle, and the evaluation output means detects the detected driving. A safe driving evaluation device characterized by outputting at the end. 16. The safe driving evaluation device according to claim 15, wherein the vehicle state detecting means detects the end of driving of the own vehicle by key-off. 17. The safe driving evaluation device according to claim 15, wherein the vehicle state detecting means detects the end of driving of the vehicle based on a position of an operation lever of the transmission and a position of a parking lever. Safe driving evaluation device. 18. The safe driving evaluation device according to claim 1, wherein the vehicle state detecting means detects the start of driving of the own vehicle, and the evaluation output means detects the detected driving. A safe driving evaluation device characterized by outputting the evaluation of the previous driving at the start. 19. The safe driving evaluation device according to claim 18, wherein the vehicle state detecting means detects the start of driving of the own vehicle by starting the engine. 20. The safe driving evaluation device according to claim 1, wherein the evaluation output unit stores a past evaluation result and compares the past evaluation result with a new evaluation result. A safe driving evaluation device for outputting a tendency of the evaluation result.