JP7268964B2 - Driving evaluation system - Google Patents

Description

The present invention relates to a driving evaluation system .

Conventionally, a system has been disclosed that visually displays the roughness of a driver's driving (for example, Patent Document 1). According to the prior art described in Patent Document 1, it has a configuration in which the value of the acceleration sensor (G sensor) is output as a histogram in order to evaluate the driving of the vehicle.

Republished WO2009/104255

However, according to the technique described in the above-mentioned Patent Document 1, the distribution of acceleration is displayed by a histogram on a straight line. There was a problem that it was difficult to make a proper judgment.

One aspect of the present invention is a driving evaluation system comprising an in-vehicle device and a driving evaluation device, wherein the in-vehicle device stores acceleration data obtained by measuring acceleration in the longitudinal direction of the vehicle and acceleration in the lateral direction of the vehicle. and a transmission unit that adds vehicle-specific information to the acceleration data acquired by the acquisition unit and transmits the acceleration data to the driving evaluation device. a receiving unit that receives the acceleration data; an identification unit that identifies a vehicle equipped with the in-vehicle device that has transmitted the acceleration data based on the unique information included in the acceleration data; Based on acceleration class information in which a class of magnitude and a class of magnitude of acceleration in the lateral direction of the vehicle are predetermined, the class of magnitude of acceleration indicated by the acceleration data acquired by the acquisition unit is determined as the A judging unit for making judgments in the front-rear direction and the left-right direction, and a display element indicating the class of the magnitude of acceleration judged by the judgment unit. a display data generation unit for generating display data to be displayed on a coordinate plane indicated by a horizontal axis indicating a class of acceleration in a direction; a storage unit for storing an evaluation stage as a characteristic value corresponding to the class; an evaluation unit that evaluates the driving state of the vehicle based on the result of the determination of the magnitude class of the acceleration by the unit and the evaluation grade stored in the storage unit; For each of the plurality of acceleration data measured chronologically at the timing of, based on the results of the determination of the acceleration magnitude class by the determination unit, the appearance frequency of each acceleration magnitude class and a frequency calculation unit that calculates a plurality of times measured in chronological order at a plurality of timings with an interval of one month among the plurality of timings acquired by the acquisition unit. is a driving evaluation system for calculating the frequency of occurrence of each of the acceleration magnitude classes based on the results of the judgment of the acceleration magnitude classes by the judging unit for each of the acceleration data.
In one aspect of the present invention, in the driving evaluation system described above, the transmission unit transmits the acceleration data to the driving evaluation device based on a request from the driving evaluation device.

Further, according to one aspect of the present invention, in the above-described driving evaluation system , the display data indicates forward acceleration occurring in the vehicle in the positive direction of the vertical axis, and acceleration occurring in the vehicle in the negative direction of the vertical axis. Indicates acceleration in the backward direction.

In one aspect of the present invention, in the driving evaluation system described above, the display data generation unit generates display data for displaying information indicating the appearance frequency calculated by the frequency calculation unit on the coordinate plane. do.
In one aspect of the present invention, in the driving evaluation system described above, the display data generation unit converts the information indicating the appearance frequency calculated by the frequency calculation unit into a three-dimensional graph in which the height axis is the frequency. Generate display data to be displayed by .

In one aspect of the present invention, in the driving evaluation system described above, the display data includes information indicating an evaluation stage as a characteristic value corresponding to the class.

Advantageous Effects of Invention According to the present invention, it is possible to provide a driving evaluation system capable of improving visibility when evaluating the driving state of a vehicle.

It is a figure showing an example of an outline of composition of a driving evaluation system concerning this embodiment. It is a figure which shows an example of the direction of the acceleration of the vehicle which the acceleration data of this embodiment shows. It is a figure showing an example of functional composition of a driving evaluation system of this embodiment. It is a figure which shows an example of the acceleration data memorize|stored in the cumulative acceleration data storage part classified by vehicle of this embodiment. It is a figure which shows an example of the display coordinate reference value memorize|stored in the display coordinate reference value storage part of this embodiment. It is a figure which shows an example of the evaluation reference value memorize|stored in the evaluation reference value storage part of this embodiment. It is a figure which shows an example of the 1st operation|movement of the driving|running evaluation apparatus of this embodiment. It is a figure which shows an example of the 2nd operation|movement of the driving|running evaluation apparatus of this embodiment. It is a figure which shows an example of the determination result of the class by the display coordinate determination part of this embodiment. It is a figure which shows an example of the display data of this embodiment. It is a figure which shows the 1st modification of the display data of this embodiment. It is a figure which shows the 2nd modification of the display data of this embodiment. It is a figure which shows the 3rd modification of the display data of this embodiment. It is a figure which shows the 4th modification of the display data of this embodiment. It is a figure which shows the 5th modification of the display data of this embodiment. It is a figure which shows the 6th modification of the display data of this embodiment. It is a figure which shows the 7th modification of the display data of this embodiment. It is a figure which shows the 8th modification of the display data of this embodiment. FIG. 20 is a diagram showing a ninth modification of display data according to the present embodiment; FIG. 20 is a diagram showing a tenth modification of display data according to the present embodiment; It is a figure showing an example of functional composition of a driving evaluation system concerning a 2nd embodiment of the present invention.

[First embodiment]
An embodiment according to the present invention will be described below with reference to the drawings.
FIG. 1 is a diagram showing an example of an overview of the configuration of a driving evaluation system 1 according to this embodiment.

[Overview of Configuration of Driving Evaluation System 1]
The driving evaluation system 1 includes an in-vehicle detection unit 10 , a driving evaluation device 20 and an output device 30 . The in-vehicle detection unit 10 is mounted on the vehicle C and detects acceleration caused by the vehicle C running. The in-vehicle detector 10 stores the detected acceleration as acceleration data AD. The driving evaluation device 20 generates display data GD indicating the driving situation of the vehicle C based on the acceleration data AD stored by the in-vehicle detection unit 10 . The output device 30 displays the generated display data GD.

The driving evaluation system 1 is introduced, for example, to a transportation company that manages operation of a plurality of vehicles C, or the like. The driving evaluation system 1 calculates information indicating the driving situation of the vehicle C (for example, the frequency of sudden acceleration, sudden deceleration, and sudden steering) based on the acceleration occurring in the vehicle C, and stores the calculated information as display data GD. and presented to the driver of the vehicle C.

In this example, the in-vehicle detection unit 10 and the driving evaluation device 20 are connected via a network N1. The in-vehicle detection unit 10 transmits the acceleration data AD to the driving evaluation device 20 via the network N1.
Note that the driving evaluation device 20 may acquire the acceleration data AD without going through the network N1. For example, when a portable storage medium (not shown) is attached to the in-vehicle detection unit 10, the in-vehicle detection unit 10 stores the acceleration data AD in this storage medium. The driving evaluation device 20 reads the acceleration data AD from the storage medium removed from the in-vehicle detection unit 10 . In the following, a case where the driving evaluation device 20 acquires the acceleration data AD via the wireless or wired network N1 will be described as an example.

The driving evaluation device 20 can acquire acceleration data AD from a plurality of vehicles C. FIG. In the example shown in the figure, the driving evaluation device 20 acquires acceleration data AD from a plurality of vehicles C including vehicle C1, vehicle C2, . . . , and vehicle Cn (n is a natural number). In this case, unique information of the vehicle C (for example, vehicle ID) is attached to the acceleration data AD. Based on this vehicle ID, the driving evaluation device 20 determines from which vehicle C the acceleration data AD is obtained. In the following description, vehicles C1, C2, .
Next, the direction of acceleration of the vehicle C indicated by the acceleration data AD will be described with reference to FIG.

[Acceleration direction indicated by acceleration data AD]
FIG. 2 is a diagram showing an example of the acceleration direction of the vehicle C indicated by the acceleration data AD of the present embodiment. When the vehicle C transitions from a stopped state to a forward state (that is, when the accelerator pedal is depressed and accelerated forward), the vehicle C is subject to forward acceleration. When the vehicle C transitions from a forward state to a stopped state (that is, when the brake pedal is depressed while driving forward and decelerates), the vehicle C undergoes rearward acceleration. When the vehicle C turns to the right, the vehicle C is accelerated in the right direction. When the vehicle C turns to the left, the vehicle C generates acceleration in the left direction.
In the following description, the directions of acceleration of the vehicle C are indicated by two orthogonal axes, the Xa axis and the Ya axis. The Xa axis indicates acceleration in the horizontal direction. The Ya axis indicates the acceleration of the vehicle C in the longitudinal direction. Further, with the origin Oa of the acceleration as the center, rightward acceleration is indicated by the positive direction of the Xa axis, and leftward acceleration is indicated by the negative direction of the Xa axis. Forward acceleration is indicated by the positive direction of the Ya axis, and rearward acceleration is indicated by the negative direction of the Ya axis, with the origin Oa of acceleration as the center.

[Functional configuration of driving evaluation system 1]
Next, an example of the functional configuration of the driving evaluation system 1 will be described with reference to FIG. 3 .
FIG. 3 is a diagram showing an example of the functional configuration of the driving evaluation system 1 of this embodiment.

The in-vehicle detection unit 10 includes an acceleration detection unit 110 , an acceleration data storage unit 120 and an acceleration data transmission unit 130 .
The acceleration detection unit 110 includes, for example, a biaxial acceleration sensor, and detects acceleration generated in the vehicle C. As shown in FIG. Acceleration detection unit 110 outputs information on the detected acceleration to acceleration data storage unit 120 . As described above, the acceleration information output by the acceleration detection unit 110 includes information indicating the acceleration of the vehicle C in the longitudinal direction and information indicating the acceleration of the vehicle C in the lateral direction.

The acceleration data storage unit 120 includes, for example, a nonvolatile memory element, and stores acceleration information output by the acceleration detection unit 110 . Here, the acceleration data storage unit 120 associates the acceleration information output by the acceleration detection unit 110, the identification information for identifying the vehicle C, and the date and time information indicating the date and time when the acceleration was detected, and stores the acceleration data AD. remember as

The acceleration data transmission unit 130 reads the acceleration data AD stored in the acceleration data storage unit 120 and transmits it to the driving evaluation device 20 . Here, the acceleration data transmission unit 130 may transmit based on a request from the driving evaluation device 20, or may transmit according to the operation of the manager or driver of the vehicle C. FIG.

The driving evaluation device 20 includes an acceleration data reception unit 210 , a vehicle identification unit 220 , a storage unit 230 , a display coordinate determination unit 240 , a display coordinate frequency calculation unit 250 , and a display data generation unit 260 .

The acceleration data reception unit 210 acquires the acceleration data AD transmitted by the acceleration data transmission unit 130 of the in-vehicle detection unit 10 . As described above, the acceleration data AD includes data obtained by measuring the acceleration of the vehicle C in the longitudinal direction and the acceleration of the vehicle C in the lateral direction. That is, the acceleration data receiving unit 210 acquires the acceleration data AD in which the acceleration in the longitudinal direction of the vehicle C and the acceleration in the lateral direction of the vehicle C are respectively measured.
The acceleration data receiving section 210 outputs the acquired acceleration data AD to the vehicle identification section 220 .

The vehicle identification unit 220 identifies the vehicle C that has transmitted the acceleration data AD based on the unique information (for example, vehicle ID) of the vehicle C included in the acceleration data AD. Vehicle identification unit 220 causes storage unit 230 to store acceleration data AD based on the identification result.

The storage unit 230 includes a vehicle-by-vehicle cumulative acceleration data storage unit 231 , a display coordinate reference value storage unit 232 , and an evaluation reference value storage unit 233 . First, the configuration of the vehicle-by-vehicle cumulative acceleration data storage unit 231 will be described.

The vehicle-by-vehicle cumulative acceleration data storage unit 231 stores acceleration data AD for each vehicle C. FIG. FIG. 4 shows an example of the acceleration data AD stored in the vehicle-by-vehicle cumulative acceleration data storage unit 231. As shown in FIG.
The vehicle-by-vehicle accumulated acceleration data storage unit 231 stores the acceleration data AD of each of the plurality of vehicles C. Here, the acceleration data AD of the vehicle C1 will be explained, and the acceleration data of the vehicles C2 . . . Description of AD is omitted.

FIG. 4 is a diagram showing an example of the acceleration data AD stored in the vehicle-by-vehicle cumulative acceleration data storage unit 231 of the present embodiment. The vehicle-by-vehicle cumulative acceleration data storage unit 231 stores sampling numbers. , the acceleration value in the Xa-axis direction (acceleration value X) and the acceleration value in the Ya-axis direction (acceleration value Y) are associated with each other and stored as acceleration data AD. Here, sampling No. is information indicating the order in which the acceleration is detected in the vehicle C. As shown in FIG. For example, a case where the in-vehicle detection unit 10 detects the acceleration of the vehicle C at a predetermined sampling period (for example, every 1 second) and stores the acceleration data AD will be described. In this example, the vehicle-by-vehicle cumulative acceleration data storage unit 231 stores acceleration data AD for each second.

Returning to FIG. 3, the display coordinate reference value storage unit 232 stores the display coordinate reference value DCR. An example of the display coordinate reference value DCR stored in the display coordinate reference value storage unit 232 will be described with reference to FIG.

FIG. 5 is a diagram showing an example of the display coordinate reference value DCR stored in the display coordinate reference value storage unit 232 of this embodiment. The display coordinate reference value DCR is information indicating the magnitude class of acceleration occurring in the vehicle C for each direction of acceleration. For example, in one example of the acceleration data AD shown in FIG. In the case of 1 (acceleration value X=0, acceleration value Y=0), the class in the horizontal display coordinate axis Xd direction is "6" and the class in the longitudinal display coordinate axis Yd direction is "F". That is, sampling No. If 1, the rank is indicated as "6F". Also, sampling No. In the case of 2 (acceleration value X=-0.21, acceleration value Y=-0.22), the class in the horizontal display coordinate axis Xd direction is "4" and the class in the longitudinal display coordinate axis Yd direction is "H". . That is, sampling No. For 2, the rank is indicated as "4H".

Returning to FIG. 3, the display coordinate determination unit 240 determines the class of the magnitude of acceleration indicated by the acceleration data AD based on the acceleration data AD and the display coordinate reference value DCR.

That is, the display coordinate determination unit 240 (determination unit) determines a display coordinate reference value DCR in which a class of acceleration in the longitudinal direction of the vehicle C and a class of acceleration in the lateral direction of the vehicle C are predetermined. Based on the (acceleration class information), the class of the magnitude of acceleration indicated by the acceleration data AD acquired by the acceleration data receiving unit 210 (acquisition unit) is determined for each of the front-rear direction and the left-right direction.

The display coordinate determination unit 240 outputs the determination result to the display coordinate frequency calculation unit 250 as a display coordinate determination result DC.

The display coordinate frequency calculation unit 250 calculates the occurrence frequency for each class based on the display coordinate determination result DC output by the display coordinate determination unit 240 . The display coordinate frequency calculation unit 250 outputs the calculated result to the display data generation unit 260 as the frequency calculation result CV.
That is, the display coordinate frequency calculation unit 250 (frequency calculation unit) calculates the display coordinates for each of a plurality of pieces of acceleration data AD that are measured in chronological order at a plurality of timings acquired by the acceleration data reception unit 210 (acquisition unit). The appearance frequency of each acceleration magnitude class is calculated based on the results obtained by the determination unit 240 (determination unit) determining each acceleration magnitude class.

The display data generation unit 260 generates display data GD based on the frequency calculation result CV output by the display coordinate frequency calculation unit 250 and the evaluation reference value ER stored in the evaluation reference value storage unit 233 . Here, the evaluation reference value ER is information indicating an evaluation level as a characteristic value corresponding to the class. In other words, the display data GD includes information indicating evaluation grades as characteristic values corresponding to classes. An example of the evaluation reference value ER stored in the evaluation reference value storage unit 233 will now be described with reference to FIG.

FIG. 6 is a diagram showing an example of the evaluation reference value ER stored in the evaluation reference value storage unit 233 of this embodiment. In this example, the evaluation reference value ER is defined as a "safe range" for a range in which the magnitude of acceleration is relatively small, a "warning range (rough range)" for a range in which the magnitude of acceleration is relatively large, and The larger range is defined as the "dangerous range" and the evaluation criteria are established. In the example shown in the figure, the evaluation reference value ER has a class range of "4" to "8" for the lateral display coordinate axis Xd and a class range for the longitudinal display coordinate axis Yd from "D" to "H". ” is defined as the “safety range”. Further, the evaluation reference value ER is defined as a "dangerous range" in which the horizontal display coordinate axis Xd has classes "1" and "11" or the longitudinal display coordinate axis Yd has classes "A" and "K". there is In addition, the evaluation reference value ER defines a class between the above-described "safety range" and "dangerous range" as a "warning range."

Returning to FIG. 3, the display data generation unit 260 generates display data GD by superimposing the class indicated by the frequency calculation result CV and the evaluation criterion range indicated by the evaluation criterion value ER.
The display data generator 260 outputs the generated display data GD to the output device 30 .

The output device 30 is, for example, a personal computer and includes a display DP and a printer PR. The output device 30 displays the display data GD output from the display data generation unit 260 of the driving evaluation device 20 as an image on the display DP or prints it on the printer PR.

As described above, the display data GD is data for outputting characters and graphics to the output device 30 (for example, screen display and printing). This display data GD causes the output device 30 to display (or print) the squares of the coordinate plane shown in FIG. Here, the grids on the coordinate plane shown in FIG. 5 indicate the class of acceleration in the longitudinal direction of the vehicle C and the class of acceleration in the lateral direction of the vehicle C, respectively. That is, the display data GD includes a longitudinal display coordinate axis Yd (vertical axis) indicating the class of acceleration in the longitudinal direction of the vehicle C, and a lateral display coordinate axis Xd (horizontal axis) indicating the class of acceleration in the lateral direction of the vehicle C. to display the coordinates indicated by .
Further, the display data GD causes the display elements to be displayed in the squares corresponding to the magnitude of the acceleration determined by the display coordinate determination unit 240 among the squares of the coordinate plane shown in FIG.
That is, the display data generating unit 260 converts the display element indicating the class of the magnitude of acceleration determined by the display coordinate determining unit 240 to the longitudinal display coordinate axis Yd (vertical axis) indicating the class of acceleration in the longitudinal direction of the vehicle C. and the horizontal display coordinate axis Xd (horizontal axis) indicating the class of acceleration of the vehicle C in the horizontal direction.
The “display elements” include various display modes such as marks, dots, geometric patterns, and solid color grids of display coordinates.

In other words, in the display data GD, the positive direction of the longitudinal display coordinate axis Yd (vertical axis) indicates the forward acceleration of the vehicle C, and the negative direction of the longitudinal display coordinate axis Yd (vertical axis) indicates the acceleration of the vehicle C. shows the backward acceleration that occurs at

[Operation of driving evaluation device 20]
Next, operation of the driving evaluation device 20 will be described with reference to FIG.
FIG. 7 is a diagram showing an example of the first operation of the driving evaluation device 20 of this embodiment. First, the operation from when the driving evaluation device 20 acquires the acceleration data AD from the vehicle C until it is stored in the storage unit 230 will be described.
(Step S10) The acceleration data receiving section 210 acquires the acceleration data AD from the vehicle C. The acceleration data reception unit 210 supplies the acquired acceleration data AD to the vehicle identification unit 220 .
(Step S20) The vehicle identification unit 220 identifies the vehicle C that has transmitted the acceleration data AD based on the unique information (for example, vehicle ID) of the vehicle C included in the acceleration data AD supplied from the acceleration data reception unit 210. do.
(Step S30) The vehicle identification unit 220 causes the vehicle-by-vehicle cumulative acceleration data storage unit 231 to store the acceleration data AD for each identified vehicle C, and ends the process.

Next, the operation of the driving evaluation device 20 to generate the display data GD based on the acceleration data AD stored in the vehicle-by-vehicle cumulative acceleration data storage unit 231 will be described with reference to FIG.
FIG. 8 is a diagram showing an example of the second operation of the driving evaluation device 20 of this embodiment.
(Step S<b>110 ) The display coordinate determination unit 240 acquires the acceleration data AD from the vehicle-by-vehicle cumulative acceleration data storage unit 231 .
(Step S<b>120 ) The display coordinate determination section 240 acquires the display coordinate reference value DCR from the display coordinate reference value storage section 232 .
(Step S130) The display coordinate determination unit 240 determines the class of the magnitude of acceleration indicated by the acceleration data AD acquired in step S110 based on the display coordinate reference value DCR acquired in step S120. An example of class determination performed by the display coordinate determination unit 240 will be described with reference to FIG.

FIG. 9 is a diagram showing an example of the class determination result by the display coordinate determination unit 240 of the present embodiment. The display coordinate determination unit 240 determines the sampling No. of the acceleration data AD. 1 (acceleration value X=0, acceleration value Y=0), the class in the horizontal display coordinate axis Xd direction is determined as "6", and the class in the longitudinal display coordinate axis Yd direction is determined as "F". That is, the display coordinate determination unit 240 determines the sampling No. For 1, the class is determined as "6F".
In addition, the display coordinate determination unit 240 determines the sampling No. of the acceleration data AD. 2 (acceleration value X=-0.21, acceleration value Y=-0.22), the class is determined as "4H".
The display coordinate determination unit 240 determines the sampling number. For 3 to m (m is a natural number), the class is determined in the same manner as described above.

(Step S140) Returning to FIG. 8, the display coordinate frequency calculation unit 250 calculates the appearance frequency for each class for the acceleration data AD. For example, in the case of the example shown in FIG. 9, the display coordinate frequency calculation unit 250 calculates the sampling No. of the acceleration data AD. 1 to sampling No. The cumulative value of appearance frequency of the class is calculated for each class in order up to m. In the case of the example in the figure, the class "2K" is the sampling No. 3 and sampling no. Appears at 5. In this case, the display coordinate frequency calculation unit 250 calculates the sampling No. In Sampling No. 3, the appearance frequency of class "2K" was calculated as "1". 5, the appearance frequency of class "2K" is calculated as "2". The display coordinate frequency calculation unit 250 outputs the appearance frequency calculated for each class to the display data generation unit 260 as the frequency calculation result CV.

(Step S150) Returning to FIG. 8, the display data generation unit 260 generates display data based on the frequency calculation result CV calculated in step S140 and the evaluation reference value ER stored in the evaluation reference value storage unit 233. Generate a GD. The display data generator 260 supplies the generated display data GD to the output device 30 . An example of the display data GD generated by the display data generator 260 will be described with reference to FIG.

[Example of display data GD: acceleration distribution]
FIG. 10 is a diagram showing an example of the display data GD of this embodiment. The display data generator 260 generates display data GD1 for displaying display elements for the display coordinates of the class whose frequency of occurrence indicated by the frequency calculation result CV calculated in step S140 is "1" or higher. Here, the "display element" includes, for example, a star-shaped mark, a dot, a geometric pattern, or a single color that fills the squares of the display coordinates.

As described above, in the driving evaluation system 1 of the present embodiment, the display data generator 260 converts the display elements indicating the magnitude class of acceleration of the vehicle C to the longitudinal direction indicating the class of acceleration in the longitudinal direction of the vehicle C. Display data GD to be displayed on a coordinate plane indicated by a display coordinate axis Yd (vertical axis) and a lateral display coordinate axis Xd (horizontal axis) indicating the class of acceleration in the lateral direction of the vehicle C is generated. Here, the magnitude of acceleration is information that objectively indicates the driving situation of the vehicle C (for example, the degree of politeness or the degree of violence). According to the driving evaluation system 1 configured in this way, it is possible to present the driving situation of the vehicle C objectively and with good visibility.

In addition, in the driving evaluation system 1 of the present embodiment, the display data generator 260 indicates the forward acceleration occurring in the vehicle C in the positive direction of the longitudinal display coordinate axis Yd (vertical axis), The negative direction of the vertical axis) produces display data GD indicating the rearward acceleration that the vehicle C experiences. That is, when the vehicle C is viewed from above (that is, when viewed from above), the display data GD associates the front of the vehicle C with the upper portion of the display surface and the rear portion of the vehicle C with the lower portion of the display surface. Display on the display DP (or printer PR). According to the driving evaluation system 1 configured in this way, it is possible to present the direction in which the acceleration of the vehicle C is generated in a way that makes it easier for the person viewing the screen (or the paper) to intuitively understand. can.

In addition, in the driving evaluation system 1 of the present embodiment, the display data generation unit 260 generates display data GD for displaying information indicating the appearance frequency calculated by the display coordinate frequency calculation unit 250 on a coordinate plane. Here, the information indicating the appearance frequency is, for example, information that defines the display form of the graph, such as gradation, color change, and three-dimensional stacking on a coordinate plane. According to the driving evaluation system 1 configured in this manner, it is easy for a person viewing the screen (or paper) to intuitively understand the occurrence frequency for each class (rank) of the acceleration of the vehicle C. can be presented as

In addition, in the driving evaluation system 1 of the present embodiment, the display data GD generated by the display data generator 260 includes an evaluation reference value ER (information indicating an evaluation stage) as a characteristic value corresponding to the class. . According to the driving evaluation system 1 configured in this manner, the driver of the vehicle C is asked in which of the "safe range", "warning range", and "dangerous range" the acceleration generated in the vehicle C is. It can be presented with good visibility.

Next, modified examples of the display data GD will be described with reference to FIGS. 11 to 20. FIG.

[Modified Example of Display Data GD (Part 1) Superposition with Evaluation Reference Value]
FIG. 11 is a diagram showing a first modification of the display data GD of this embodiment. In this modified example, the display data generation unit 260 superimposes the display of the "safe area", the "warning area", and the "dangerous area" indicated by the evaluation reference value ER on the above-described display data GD1. Generate as GD2.

[Modification of Display Data GD (Part 2) Frequency Display of Acceleration Distribution]
FIG. 12 is a diagram showing a second modification of the display data GD of this embodiment. In this modification, the display data generator 260 generates display data GD3 instead of the display data GD1 described above. This display data GD3 is data for displaying the frequency of appearance indicated by the frequency calculation result CV calculated in step S140 in shades corresponding to the frequency of appearance. For example, the display data generator 260 generates the display data GD3 for displaying the display coordinates of the class with a high appearance frequency indicated by the frequency calculation result CV in a dark color and the display coordinates of the class with a low appearance frequency in a light color.
As shown in the figure, the display data generator 260 generates data in which the display data GD3 is superimposed with the "safe area", "warning area", and "dangerous area" indicated by the evaluation reference value ER. You may

[Modified Example of Display Data GD (Part 3) Modified Example of Evaluation Reference Value]
FIG. 13 is a diagram showing a third modification of the display data GD of this embodiment. In this modification, the "safe area", "warning area", and "dangerous area" indicated by the evaluation reference value ER are not rectangular but circular or elliptical. The display data generation unit 260 generates display data GD4 by superimposing the “safe area”, “warning area”, and “dangerous area” in circular or elliptical form on the above-described display data GD3. Generate.

[Modification of Display Data GD (Part 4) When Acceleration Distribution is Shown with Detailed Dots]
FIG. 14 is a diagram showing a fourth modification of the display data GD of this embodiment. This modification is different in that the classes indicated by the display coordinate reference value DCR are divided more finely than the above-described embodiment and each modification. In this case, the display data generating unit 260 generates the display data GD5 according to more finely divided classes (for example, more detailed dot display).

[Modification of Display Data GD (No. 5) Displaying Frequency of Acceleration Distribution by Color]
FIG. 15 is a diagram showing a fifth modification of the display data GD of this embodiment. This modification differs in that the display elements are displayed in different colors according to the appearance frequency of the class. In this case, the display data generation unit 260 sets the display coordinates of the class with the high appearance frequency indicated by the frequency calculation result CV to the first color (for example, red), and sets the display coordinates of the class of the medium appearance frequency to the second color ( For example, the display data GD6 is generated to display the display coordinates of a class with a low appearance frequency in a third color (eg, blue).

[Modification of Display Data GD (Part 6) Indicating Frequency of Acceleration Distribution by Dot Size]
FIG. 16 is a diagram showing a sixth modification of the display data GD of this embodiment. This modification is different in that display elements are displayed in which the dot size is divided according to the appearance frequency of the class. In this case, the display data generation unit 260 sets the display coordinates of the class with high appearance frequency indicated by the frequency calculation result CV to the first size (for example, large dot size), and sets the display coordinates of the class of medium appearance frequency to the second size. The display data GD7 is generated to display the display coordinates of the class with a low appearance frequency as the third size (for example, small dot size) in the size (for example, medium dot size).

[Modified Example of Display Data GD (Part 7) When Acceleration Distribution Frequency is Displayed Three-Dimensionally]
FIG. 17 is a diagram showing a seventh modification of the display data GD of this embodiment. In this modified example, the distribution of the acceleration data AD is displayed by a three-dimensional graph, and the appearance frequency of the class is determined by the size in the Z-axis direction perpendicular to the plane formed by the left-right display coordinate axis Xd and the front-back display coordinate axis Yd (that is, height). In this case, the display data generator 260 generates display data GD8 for displaying a three-dimensional graph of display heights according to the frequency of appearance indicated by the frequency calculation result CV for each class.
Note that the appearance frequency of a class (for example, class “6F”) in which the acceleration is about 0 in both the left-right direction and the front-rear direction may be very high. In this case, if the height of the three-dimensional graph is determined based on the appearance frequency of the class "6F", the height of the other classes with relatively low appearance frequencies will be very low, resulting in poor visibility. Sometimes I end up doing it.
For this reason, the display data generation unit 260 does not depend on the actual frequency of appearance of a class in which the acceleration is about 0 in both the left-right direction and the front-rear direction (for example, the class “6F” and its surrounding classes). The height may be trimmed to a certain height. By configuring in this way, the driving evaluation device 20 can provide the display data GD in which the visibility of the appearance frequency of the "warning area" and the "dangerous area" is relatively enhanced.

[Modified example of display data GD (No. 8) When frequency of acceleration distribution is three-dimensionally color-coded]
FIG. 18 is a diagram showing an eighth modified example of the display data GD of this embodiment. This modification differs in that the three-dimensional graph showing the distribution of the acceleration data AD is color-coded according to the appearance frequency of the classes. In this case, the display data generator 260 generates display data GD9 for displaying a three-dimensional graph of display colors according to the frequency of appearance indicated by the frequency calculation result CV for each class.

[Modification of Display Data GD (Part 9) Displaying Frequency of Acceleration Distribution in Bar Graph]
FIG. 19 is a diagram showing a ninth modification of the display data GD of this embodiment. This modification is different in that the three-dimensional graph showing the distribution of the acceleration data AD is displayed as a bar graph whose height corresponds to the appearance frequency of classes. In this case, the display data generation unit 260 generates display data GD10 for displaying a three-dimensional bar graph with height corresponding to the frequency of appearance indicated by the frequency calculation result CV for each class.

[Modification of Display Data GD (Part 10) Displaying Time Change in Frequency of Acceleration Distribution]
FIG. 20 is a diagram showing a tenth modification of the display data GD of this embodiment. This modification is different in that the graphs showing the distribution of the acceleration data AD are arranged in chronological order and displayed. In this example, the display data GD11-1 shown in FIG. 20A shows the distribution of the acceleration data AD of a certain vehicle C three months ago. Display data GD11-2 shown in FIG. 20B shows the distribution of acceleration data AD of a certain vehicle C two months ago. Display data GD11-3 shown in FIG. 20C shows the distribution of acceleration data AD of a certain vehicle C one month ago. Display data GD11-4 shown in FIG. 20(D) indicates the distribution of acceleration data AD of a certain vehicle C for the current month. According to the driving evaluation device 20 configured in this manner, the display data GD are arranged in chronological order and displayed, so that the degree of improvement in the driving skill of the driver of the vehicle C can be presented with good visibility. .

[Second embodiment]
FIG. 21 is a diagram showing an example of the functional configuration of a driving evaluation system 1a according to the second embodiment of the invention. The driving evaluation system 1a differs from the above-described first embodiment and modifications in that the driving evaluation device 20a includes a driving state determination unit 270. FIG.

The driving state determination unit 270 determines the driving state of the vehicle C based on the frequency calculation result CV output by the display coordinate frequency calculation unit 250 and the evaluation reference value ER stored in the evaluation reference value storage unit 233. do. That is, the driving state determination unit 270 (evaluation unit) evaluates the driving state of the vehicle C based on the result of the determination of the magnitude class of the acceleration by the display coordinate determination unit 240 (determination unit) and the evaluation stage. do.
Specifically, when the cumulative value of the classes of the acceleration data AD is less than 5 times in the "danger area" indicated by the evaluation reference value ER and is 10 times or more in the "warning area", the driving state determination unit 270 outputs a driving state determination result CD indicating "caution required". Further, when the cumulative value of the classes of the acceleration data AD is 5 times or more and less than 10 times in the "dangerous region" indicated by the evaluation reference value ER, the driving state determination unit 270 determines the driving state determination result indicating "strict caution". Output a CD. Further, when the cumulative value of the classes of the acceleration data AD is 10 times or more in the "dangerous area" indicated by the evaluation reference value ER, the driving state determination unit 270 outputs the driving state determination result CD indicating "no boarding". do.

As described above, the magnitude of the acceleration of the vehicle C is information that objectively indicates the driving situation of the vehicle C (for example, the degree of politeness and the degree of violence). According to the driving evaluation system 1a configured in this way, since the driving state of the vehicle C is presented based on the objective index, the degree of satisfaction of the driver of the vehicle C with the presented information is improved. be able to.

Although the embodiments of the present invention have been described above in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications can be made as appropriate without departing from the scope of the present invention. can.

Each of the devices described above has a computer inside. The process of each process of each device described above is stored in a computer-readable recording medium in the form of a program, and the above process is performed by reading and executing this program by a computer. Here, the computer-readable recording medium refers to magnetic disks, magneto-optical disks, CD-ROMs, DVD-ROMs, semiconductor memories, and the like. Alternatively, the computer program may be distributed to a computer via a communication line, and the computer receiving the distribution may execute the program.

Further, the program may be for realizing part of the functions described above.
Further, it may be a so-called difference file (difference program) that can realize the above-described functions in combination with a program already recorded in the computer system.

DESCRIPTION OF SYMBOLS 1, 1a... Driving evaluation system 10... Vehicle-mounted detection part 20, 20a... Driving evaluation apparatus 30... Output device 110... Acceleration detection part 120... Acceleration data storage part 130... Acceleration data transmission part 210... Acceleration Data receiving unit 220 Vehicle identification unit 230 Storage unit 231 Cumulative acceleration data storage unit for each vehicle 232 Display coordinate reference value storage unit 233 Evaluation reference value storage unit 240 Display coordinate determination unit 250 Display coordinate frequency calculation unit 260 Display data generation unit 270 Driving state determination unit DP Display PR Printer C Vehicle AD Acceleration data DCR Display coordinate reference value DC Display coordinate Judgment result, CV... Frequency calculation result, ER... Evaluation reference value, GD... Display data, Oa... Acceleration origin, Ya... Back-and-forth acceleration axis, Xa... Left-right acceleration axis, Yd... Back-and-forth display coordinate axis, Xd... Left-right direction Display coordinate axis

Claims (6)

A driving evaluation system comprising an in-vehicle device and a driving evaluation device,
The in-vehicle device
an acquisition unit that acquires acceleration data obtained by measuring acceleration in the longitudinal direction of the vehicle and acceleration in the lateral direction of the vehicle;
a transmission unit that adds vehicle-specific information to the acceleration data acquired by the acquisition unit and transmits the data to the driving evaluation device;
with
The driving evaluation device
a receiving unit that receives the acceleration data from the in-vehicle device;
an identification unit that identifies a vehicle equipped with the in-vehicle device that has transmitted the acceleration data based on the unique information included in the acceleration data;
Based on acceleration class information in which a class of magnitude of acceleration in the longitudinal direction of the vehicle and a class of magnitude of acceleration in the lateral direction of the vehicle are predetermined, the acceleration indicated by the acceleration data acquired by the acquisition unit is determined. a determination unit that determines the size class in each of the front-rear direction and the left-right direction;
The display element indicating the class of the magnitude of acceleration determined by the determining unit is represented by the vertical axis representing the class of acceleration in the longitudinal direction of the vehicle and the horizontal axis representing the class of acceleration in the lateral direction of the vehicle. a display data generation unit that generates display data to be displayed on a plane;
a storage unit that stores an evaluation grade as a characteristic value corresponding to the class;
an evaluation unit that evaluates the driving state of the vehicle based on the result of the determination of the magnitude class of the acceleration by the determination unit and the evaluation grade stored in the storage unit;
For each of the plurality of acceleration data measured in time series at a plurality of timings acquired by the acquisition unit, the determination unit determines the magnitude class of the acceleration based on the result of each determination of the acceleration. a frequency calculation unit that calculates the appearance frequency of the size class;
with
The frequency calculation unit determines the determination unit for each of the plurality of acceleration data measured chronologically at a plurality of timings at intervals of one month among the plurality of timings acquired by the acquisition unit. Based on the result of determining each acceleration magnitude class, calculate the frequency of appearance of each acceleration magnitude class
Driving evaluation system. The transmission unit
The driving evaluation system according to claim 1, wherein the acceleration data is transmitted to the driving evaluation device based on a request from the driving evaluation device. The display data is
3. The driving evaluation system according to claim 1 or 2, wherein the positive direction of the vertical axis represents forward acceleration of the vehicle, and the negative direction of the vertical axis represents rearward acceleration of the vehicle. 4. The display data generation unit according to any one of claims 1 to 3, wherein the display data generation unit generates display data for displaying information indicating the appearance frequency calculated by the frequency calculation unit on the coordinate plane. Driving evaluation system. The display data generation unit
5. The driving evaluation system according to claim 4 , further comprising: generating display data for displaying the information indicating the frequency of appearance calculated by the frequency calculation unit in a three-dimensional graph with frequency on a height axis. The driving evaluation system according to any one of claims 1 to 5 , wherein the display data includes information indicating an evaluation stage as a characteristic value corresponding to the class.

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