JP2019212021A - Driving evaluation device - Google Patents

Abstract

To improve visibility in evaluating a driving state of a vehicle.SOLUTION: A driving evaluation device includes: an acquisition part for acquiring acceleration data obtained by measuring acceleration in the longitudinal direction of a vehicle and acceleration in the lateral direction of the vehicle; a determination part for determining a class of acceleration magnitude indicated by acceleration data acquired by the acquisition part in the longitudinal direction and the lateral direction respectively, based on acceleration class information in which a class of acceleration magnitude in the longitudinal direction of the vehicle and a class of acceleration magnitude in the lateral direction are preset; and a display data generation part for generating display data that displays on the coordinate plane indicated by the vertical axis indicating the class of acceleration in the longitudinal direction of the vehicle and the lateral axis indicating the class of acceleration in the lateral direction of the vehicle a display element indicating the class of acceleration magnitude determined by the determination part.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a driving evaluation apparatus.

  Conventionally, a system for visually displaying the roughness of driving by a driver has been disclosed (for example, Patent Document 1). According to the prior art described in Patent Document 1, 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 Patent Document 1 described above, the acceleration distribution is displayed by a histogram on a straight line, and when the user evaluates or determines the driving state of the vehicle, the user lacks visibility and is intuitive. There was a problem that it was difficult to make a proper judgment.

  One aspect of the present invention is an acquisition unit that acquires acceleration data obtained by measuring acceleration in the longitudinal direction of a vehicle and acceleration in the lateral direction of the vehicle, a class of magnitudes of accelerations in the longitudinal direction of the vehicle, Based on acceleration class information in which the magnitude of acceleration in the left-right direction is determined in advance, the magnitude of acceleration indicated by the acceleration data acquired by the acquisition unit is set in the front-rear direction and the left-right direction, respectively. A determination unit for determining, a display element indicating a class of acceleration determined by the determination unit, a vertical axis indicating a class of acceleration in the longitudinal direction of the vehicle, and a horizontal element indicating a class of acceleration in the horizontal direction of the vehicle And a display data generation unit that generates display data to be displayed on a coordinate plane indicated by an axis.

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

  Further, according to one aspect of the present invention, in the above-described driving evaluation device, the determination unit may determine the magnitude of acceleration for each of the plurality of acceleration data measured in time series at a plurality of timings acquired by the acquisition unit. A frequency calculating unit that calculates the frequency of appearance of each of the acceleration magnitudes based on the result of determining each class of the display, and the display data generating unit includes the appearance calculated by the frequency calculating unit Display data for displaying information indicating the frequency on the coordinate plane is generated.

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

  Further, according to one aspect of the present invention, in the above-described driving evaluation device, evaluation that evaluates a driving state of the vehicle based on a result of the determination unit determining a class of the magnitude of the acceleration and the evaluation stage. A section.

  ADVANTAGE OF THE INVENTION According to this invention, the driving | running evaluation apparatus which can improve the visibility in the case of evaluation of the driving | running state of a vehicle can be provided.

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 show. It is a figure which shows an example of a function structure of the driving | operation evaluation system of this embodiment. It is a figure which shows an example of the acceleration data memorize | stored in the accumulation 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 memory | 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 memory | 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. It is a figure which shows the 9th modification of the display data of this embodiment. It is a figure which shows the 10th modification of the display data of this embodiment. It is a figure which shows an example of a function structure of the driving | operation evaluation system which concerns on the 2nd Embodiment of this invention.

[First Embodiment]
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram illustrating an example of an outline of a configuration of a driving evaluation system 1 according to the present 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 generated by the traveling of the vehicle C. The in-vehicle detection unit 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 as an example to a transportation company that manages the operation of a plurality of vehicles C. The driving evaluation system 1 calculates information indicating the driving status of the vehicle C (for example, the frequency of sudden acceleration, sudden deceleration, and sudden steering) based on the acceleration generated in the vehicle C, and displays the calculated information as display data GD. 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.
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 acceleration data AD in the 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, the 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. In the example shown in the figure, the driving evaluation device 20 acquires acceleration data AD from a plurality of vehicles C including a vehicle C1, a vehicle C2, ..., a vehicle Cn (n is a natural number). In this case, unique information (for example, vehicle ID) of the vehicle C is attached to the acceleration data AD. The driving evaluation device 20 determines from which vehicle C the acceleration data AD is information acquired based on the vehicle ID. In the following description, when the vehicle C1, the vehicle C2,..., The vehicle Cn are not distinguished, they are simply described as the vehicle C.
Next, the direction of the 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 illustrating an example of the direction of acceleration of the vehicle C indicated by the acceleration data AD of the present embodiment. When the vehicle C transitions from the stopped state to the forward state (that is, when the accelerator pedal is depressed and accelerates forward), the vehicle C generates forward acceleration. When the vehicle C transitions from the forward state to the stopped state (that is, when the brake pedal is stepped on and decelerated during traveling forward), the vehicle C is subjected to backward acceleration. When the vehicle C turns to the right, the vehicle C has a rightward acceleration. When the vehicle C makes a left turn, the vehicle C has a leftward acceleration.
In the following description, the acceleration direction of the vehicle C is indicated by two orthogonal axes of the Xa axis and the Ya axis. The Xa axis indicates the acceleration in the left-right direction. The Ya axis indicates the acceleration in the longitudinal direction of the vehicle C. Further, with the acceleration origin Oa as the center, the rightward acceleration is indicated by the positive direction of the Xa axis, and the leftward acceleration is indicated by the negative direction of the Xa axis. Further, centering on the acceleration origin Oa, the forward acceleration is indicated by the positive direction of the Ya axis, and the backward acceleration is indicated by the negative direction of the Ya axis.

[Functional configuration of driving evaluation system 1]
Next, an example of a functional configuration of the driving evaluation system 1 will be described with reference to FIG.
FIG. 3 is a diagram illustrating an example of a functional configuration of the driving evaluation system 1 according to the present 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. The acceleration detection unit 110 outputs the detected acceleration information to the acceleration data storage unit 120. As described above, the acceleration information output by the acceleration detection unit 110 includes information indicating the longitudinal acceleration of the vehicle C and information indicating the lateral acceleration of the vehicle C.

  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 acceleration information output from the acceleration detection unit 110, identification information for identifying the vehicle C, and date / time information indicating the date / time when the acceleration was detected, to thereby associate 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 part 130 may transmit based on the request | requirement of the driving | running evaluation apparatus 20, and may be transmitted by the management of the vehicle C, or a driver | operator.

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

The acceleration data receiving unit 210 acquires acceleration data AD transmitted by the acceleration data transmitting unit 130 of the in-vehicle detection unit 10. As described above, the acceleration data AD includes data obtained by measuring the longitudinal acceleration of the vehicle C and the lateral acceleration of the vehicle C, respectively. That is, the acceleration data receiving unit 210 acquires acceleration data AD in which the longitudinal acceleration of the vehicle C and the lateral acceleration of the vehicle C are measured.
The acceleration data receiving unit 210 outputs the acquired acceleration data AD to the vehicle identification unit 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. The vehicle identification unit 220 stores the acceleration data AD in the storage unit 230 based on the identified 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. An example of the acceleration data AD stored in the vehicle-by-vehicle cumulative acceleration data storage unit 231 is shown in FIG.
In addition, although the acceleration data AD of each of the plurality of vehicles C is stored in the cumulative acceleration data storage unit 231 for each vehicle, the acceleration data AD of the vehicle C1 will be described here, and the acceleration data AD of the vehicle C2... A description of AD is omitted.

  FIG. 4 is a diagram illustrating an example of acceleration data AD stored in the vehicle-by-vehicle cumulative acceleration data storage unit 231 according to the present embodiment. In the cumulative acceleration data storage unit 231 for each vehicle, the sampling No. 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 acceleration is detected in the vehicle C. For example, the case where the in-vehicle detection unit 10 detects the acceleration of the vehicle C at a predetermined sampling period (for example, every second) and stores the acceleration data AD will be described. In this example, the acceleration data AD for each second is stored in the vehicle-by-vehicle cumulative acceleration data storage unit 231.

  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 illustrating an example of the display coordinate reference value DCR stored in the display coordinate reference value storage unit 232 of the present embodiment. The display coordinate reference value DCR is information indicating a class of acceleration magnitude for each direction of acceleration generated in the vehicle C. For example, in the 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 front-rear display coordinate axis Yd direction is “F”. That is, sampling No. In the case of 1, the class is indicated as “6F”. Sampling No. 2 (acceleration value X = −0.21, acceleration value Y = −0.22), the class in the left-right direction display coordinate axis Xd direction is “4”, and the class in the front-rear direction display coordinate axis Yd direction is “H”. . That is, sampling No. In the case of 2, the class 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) displays the reference coordinate reference value DCR in which the class of acceleration magnitude in the front-rear direction of the vehicle C and the class of acceleration magnitude in the left-right direction of the vehicle C are predetermined. Based on (acceleration class information), the class of the magnitude of the acceleration indicated by the acceleration data AD acquired by the acceleration data receiving unit 210 (acquisition unit) is determined in the front-rear direction and the left-right direction, respectively.

  The display coordinate determination unit 240 outputs the determination result to the display coordinate frequency calculation unit 250 as the 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) displays the display coordinates for each of the plurality of acceleration data AD measured in time series at a plurality of timings acquired by the acceleration data reception unit 210 (acquisition unit). Based on the result of the determination unit 240 (determination unit) determining the respective classes of acceleration magnitudes, the frequency of appearance of each acceleration magnitude class is calculated.

  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 stage as a characteristic value corresponding to a class. That is, the display data GD includes information indicating an evaluation stage as a characteristic value corresponding to the class. Here, an example of the evaluation reference value ER stored in the evaluation reference value storage unit 233 will be described with reference to FIG.

  FIG. 6 is a diagram illustrating an example of the evaluation reference value ER stored in the evaluation reference value storage unit 233 of the present embodiment. In this example, the evaluation reference value ER is a “safe range” in which the acceleration is relatively small, a “warning range (violent range)” in which the acceleration is relatively large, and the acceleration magnitude. Establish the evaluation criteria by setting the range where is larger as the “dangerous range”. In the example shown in the figure, the evaluation reference value ER is “4” to “8” for the range of the horizontal display coordinate axis Xd and “D” to “H” for the range of the front and rear display coordinate axis Yd. ”Is defined as“ safety range ”. The evaluation reference value ER is defined as a “risk range” in which the class of the horizontal display coordinate axis Xd is “1” and “11” or the class of the front-rear display coordinate axis Yd is “A” and “K”. Yes. The evaluation reference value ER defines the class between the “safe range” and the “danger range” as the “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 range of the evaluation reference indicated by the evaluation reference value ER.
The display data generation unit 260 outputs the generated display data GD to the output device 30.

  The output device 30 is a personal computer, for example, 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 with the printer PR.

As described above, the display data GD is data for outputting characters (for example, screen display and printing) to the output device 30. The display data GD causes the output device 30 to display (or print) the squares on the coordinate plane shown in FIG. Here, the squares on the coordinate plane shown in FIG. 5 indicate the acceleration class in the longitudinal direction of the vehicle C and the acceleration class in the horizontal direction of the vehicle C, respectively. That is, the display data GD includes a longitudinal display coordinate axis Yd (vertical axis) indicating the longitudinal acceleration class of the vehicle C, and a horizontal display coordinate axis Xd (horizontal axis) indicating the lateral acceleration class of the vehicle C. The coordinates indicated by are displayed.
In addition, the display data GD displays the display elements in the cells corresponding to the magnitude of the acceleration determined by the display coordinate determination unit 240 among the cells on the coordinate plane shown in FIG.
That is, the display data generation unit 260 uses the display element indicating the magnitude of the acceleration determined by the display coordinate determination unit 240 as the longitudinal display coordinate axis Yd (vertical axis) indicating the acceleration class in the longitudinal direction of the vehicle C. And display data GD to be displayed on a coordinate plane indicated by a horizontal display coordinate axis Xd (horizontal axis) indicating a horizontal acceleration class of the vehicle C.
The “display element” includes various display forms such as a mark, a dot, a geometric pattern, or a solid color of display coordinates filled with a single color.

  In other words, in the display data GD, the positive direction of the front-rear direction display coordinate axis Yd (vertical axis) indicates the forward acceleration generated in the vehicle C, and the negative direction of the front-rear direction display coordinate axis Yd (vertical axis) is the vehicle C. Shows the acceleration in the backward direction.

[Operation of Driving Evaluation Device 20]
Next, the operation of the driving evaluation apparatus 20 will be described with reference to FIG.
FIG. 7 is a diagram illustrating an example of a first operation of the driving evaluation apparatus 20 of the present 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 unit 210 acquires acceleration data AD from the vehicle C. The acceleration data receiving 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. To do.
(Step S30) The vehicle identification unit 220 stores the acceleration data AD in the vehicle-specific cumulative acceleration data storage unit 231 for each identified vehicle C, and ends the process.

Next, an operation until the driving evaluation device 20 generates 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 illustrating an example of the second operation of the driving evaluation apparatus 20 of the present embodiment.
(Step S <b> 110) The display coordinate determination unit 240 acquires acceleration data AD from the vehicle-by-vehicle cumulative acceleration data storage unit 231.
(Step S <b> 120) The display coordinate determination unit 240 acquires the display coordinate reference value DCR from the display coordinate reference value storage unit 232.
(Step S130) The display coordinate determination unit 240 determines the class of the magnitude of the 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 illustrating an example of a class determination result by the display coordinate determination unit 240 of the present embodiment. The display coordinate determination unit 240 includes a sampling No. in the acceleration data AD. For 1 (acceleration value X = 0, acceleration value Y = 0), the class in the left-right direction display coordinate axis Xd direction is determined as “6”, and the class in the front-rear direction display coordinate axis Yd direction is determined as “F”. That is, the display coordinate determination unit 240 determines the sampling number. For 1, the class is determined to be “6F”.
Further, the display coordinate determination unit 240 includes a sampling No. in acceleration data AD. For 2 (acceleration value X = −0.21, acceleration value Y = −0.22), the class is determined to be “4H”.
The display coordinate determination unit 240 has a 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 frequency calculation unit 250 for each display coordinate 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 frequency calculation unit 250 for each display coordinate includes a sampling No. in the acceleration data AD. 1 to sampling no. In order up to m, the cumulative value of the class appearance frequency is calculated for each class. In the example shown in FIG. 3 and Sampling No. Appears at 5. In this case, the frequency calculation unit 250 for each display coordinate sets the sampling number. 3, the appearance frequency of the class “2K” is calculated as “1”. 5, the appearance frequency of the 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 displays the 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 generation unit 260 supplies the generated display data GD to the output device 30. An example of the display data GD generated by the display data generation unit 260 will be described with reference to FIG.

[Example of display data GD: acceleration distribution]
FIG. 10 is a diagram illustrating an example of the display data GD of the present embodiment. The display data generation unit 260 generates the display data GD1 for displaying the display element for the display coordinates of the class whose appearance frequency indicated by the frequency calculation result CV calculated in step S140 is “1” or more. Here, “display elements” include, for example, star-shaped marks, dots, geometrical patterns or solid colors of display coordinates by a single color.

  As described above, in the driving evaluation system 1 according to the present embodiment, the display data generation unit 260 displays the display element indicating the class of the acceleration magnitude of the vehicle C, and the front-rear direction indicating the class of the acceleration in the front-rear 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 horizontal display coordinate axis Xd (horizontal axis) indicating a horizontal acceleration class of the vehicle C is generated. Here, the magnitude of the acceleration is information that objectively indicates the driving state of the vehicle C (for example, the degree of politeness and the degree of violence). According to the driving evaluation system 1 configured in this manner, the driving situation of the vehicle C can be presented objectively and with good visibility.

  In the driving evaluation system 1 of the present embodiment, the display data generation unit 260 indicates the acceleration in the forward direction in which the positive direction of the front-rear direction display coordinate axis Yd (vertical axis) is generated in the vehicle C, and the front-rear direction display coordinate axis Yd ( Display data GD indicating the acceleration in the backward direction in which the negative direction (vertical axis) occurs in the vehicle C is generated. In other words, the display data GD associates the front of the vehicle C with the upper side of the display surface and the rear of the vehicle C with the lower side of the display surface when the vehicle C is viewed from above (that is, when viewed from above). It is displayed on the display DP (or printer PR). According to the driving evaluation system 1 configured as described above, the direction in which the acceleration of the vehicle C is generated can be intuitively presented to a person who is looking at the screen (or paper surface). it can.

  Further, 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 the coordinate plane. Here, the information indicating the frequency of appearance is information that determines a display form of a graph such as shading, color change, and three-dimensional stacking on a coordinate plane. According to the driving evaluation system 1 configured in this way, it is easy for the person who is looking at the screen (or paper) to intuitively understand the frequency of occurrence of the acceleration of the vehicle C for each class (rank). Can be presented.

  In the driving evaluation system 1 of the present embodiment, the display data GD generated by the display data generation unit 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 as described above, for the driver of the vehicle C, whether the acceleration generated in the vehicle C is in, for example, a “safe range”, a “warning range”, or a “danger range”. It can be presented with good visibility.

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

[Modification Example of Display Data GD (Part 1) Overlay with Evaluation Reference Value]
FIG. 11 is a diagram showing a first modification of the display data GD of the present embodiment. In this modification, the display data generation unit 260 displays data obtained by superimposing the display of “safe area”, “warning area”, and “dangerous area” indicated by the evaluation reference value ER on the display data GD1 described above. Generated as GD2.

[Modification of Display Data GD (Part 2) Frequency Display of Acceleration Distribution]
FIG. 12 is a diagram illustrating a second modification of the display data GD of the present embodiment. In this modification, the display data generation unit 260 generates display data GD3 instead of the display data GD1 described above. The display data GD3 is data for displaying the appearance frequency indicated by the frequency calculation result CV calculated in step S140 with shading according to the appearance frequency. For example, the display data generation unit 260 generates display data GD3 that displays the display coordinates of the class having a high appearance frequency indicated by the frequency calculation result CV in a dark color and the display coordinates of the class having a low appearance frequency in a light color.
As shown in the figure, the display data generation unit 260 generates data in which the display of “safe area”, “warning area”, and “dangerous area” indicated by the evaluation reference value ER is superimposed on the display data GD3. May be.

[Modification Example of Display Data GD (Part 3) Modification Example of Evaluation Reference Value]
FIG. 13 is a diagram showing a third modification of the display data GD of the present embodiment. In this modification, the “safe area”, “warning area”, and “danger area” indicated by the evaluation reference value ER are shown as a circle or an ellipse instead of a rectangle. The display data generation unit 260 displays, as display data GD4, data obtained by superimposing the display of “safe area”, “warning area”, and “dangerous area” shown in a circle or an ellipse on the above-described display data GD3. Generate.

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

[Modification Example of Display Data GD (Part 5) When Frequency of Acceleration Distribution is Color-coded]
FIG. 15 is a diagram illustrating a fifth modification of the display data GD of the present embodiment. This modification is different in that display elements that are color-coded according to the appearance frequency of the class are displayed. In this case, the display data generation unit 260 sets the display coordinates of the class having a high appearance frequency indicated by the frequency calculation result CV to the first color (for example, red), and the display coordinates of the class having a medium appearance frequency to the second color ( For example, display data GD6 is generated in which the display coordinates of a class having a low appearance frequency are displayed in a third color (for example, blue).

[Modification Example of Display Data GD (No. 6) When Frequency of Acceleration Distribution is Shown in Dot Size]
FIG. 16 is a diagram illustrating a sixth modification of the display data GD of the present embodiment. This modification is different in that display elements with dot sizes divided according to the appearance frequency of the class are displayed. In this case, the display data generation unit 260 sets the display coordinates of the class having a high appearance frequency indicated by the frequency calculation result CV to the first size (for example, the dot size is large) and the display coordinates of the class having a medium appearance frequency to the second size. Display data GD7 is generated that is displayed with the display coordinates of a class having a low appearance frequency set to a third size (for example, small dot size) in the size (for example, medium dot size).

[Modification Example of Display Data GD (Part 7) When Acceleration Distribution Frequency is Displayed Three-Dimensionally]
FIG. 17 is a diagram illustrating a seventh modification of the display data GD of the present embodiment. In this modification, the distribution of the acceleration data AD is displayed by a three-dimensional graph, and the appearance frequency of the class is the size in the Z-axis direction orthogonal to the plane formed by the horizontal display coordinate axis Xd and the front-rear display coordinate axis Yd (that is, It is different in that it is displayed depending on (height). In this case, the display data generation unit 260 generates display data GD8 for displaying a three-dimensional graph having a display height corresponding to the appearance frequency indicated by the frequency calculation result CV for each class.
Note that the appearance frequency may be very high for a class (for example, class “6F”) in which the acceleration is about 0 in both the left-right direction and the front-rear direction. 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 class having a relatively low appearance frequency becomes very low, and the visibility decreases. May end up.
For this reason, the display data generation unit 260 generates a three-dimensional graph of a class whose acceleration is about 0 in both the left and right directions and the front and rear direction (for example, the class “6F” and its surrounding classes) regardless of the actual appearance frequency. The height may be trimmed to a certain height. With this configuration, the driving evaluation device 20 can provide display data GD with relatively high visibility of the appearance frequency for the “warning area” and the “dangerous area”.

[Modification Example of Display Data GD (Part 8) When Frequency of Acceleration Distribution is Displayed in Three-Dimensional Color]
FIG. 18 is a diagram illustrating an eighth modification of the display data GD of the present embodiment. This modification is different in that the three-dimensional graph indicating the distribution of the acceleration data AD is color-coded according to the appearance frequency of the class. In this case, the display data generation unit 260 generates display data GD9 for displaying a three-dimensional graph with a display color corresponding to the appearance frequency indicated by the frequency calculation result CV for each class.

[Variation of Display Data GD (No. 9) When Displaying Acceleration Distribution Frequency in Bar Graph]
FIG. 19 is a diagram illustrating a ninth modification of the display data GD of the present embodiment. This modification is different in that the three-dimensional graph showing the distribution of the acceleration data AD is displayed by a bar graph having a height corresponding to the appearance frequency of the class. In this case, the display data generation unit 260 generates display data GD10 for displaying a three-dimensional graph as a bar graph having a height corresponding to the appearance frequency indicated by the frequency calculation result CV for each class.

[Modification of Display Data GD (No. 10) Displaying Time Change of Acceleration Distribution Frequency]
FIG. 20 is a diagram illustrating a tenth modification of the display data GD of the present embodiment. This modification is different in that a graph showing the distribution of acceleration data AD is displayed in time series. In this example, display data GD11-1 shown in FIG. 20A shows the distribution of 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 a distribution of acceleration data AD of a certain vehicle C one month before. Display data GD11-4 shown in FIG. 20D shows the distribution of acceleration data AD of a certain vehicle C for the current month. According to the driving evaluation apparatus 20 configured as described above, the display data GD are displayed in time series, so that the degree of improvement in driving technology by the driver of the vehicle C can be presented with high visibility. .

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

The driving state determination unit 270 determines the driving state of the vehicle C based on the frequency calculation result CV output from the frequency calculation unit 250 for each display coordinate and the evaluation reference value ER stored in the evaluation reference value storage unit 233. To 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 display coordinate determination unit 240 (determination unit) determining the class of acceleration magnitude and the evaluation stage. To do.
Specifically, when the cumulative value of the class of the acceleration data AD is less than 5 times in the “dangerous area” indicated by the evaluation reference value ER and 10 times or more in the “warning area”, the driving state determination unit 270 Outputs the driving state determination result CD indicating “Needs attention”. Further, when the cumulative value of the class of the acceleration data AD is 5 times or more and less than 10 times in the “dangerous area” indicated by the evaluation reference value ER, the driving state determination unit 270 indicates the driving state determination result indicating “strict attention”. CD is output. Further, when the cumulative value of the class of acceleration data AD is 10 or more times 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 “riding crew”. To 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 or the degree of violence). According to the driving evaluation system 1a configured as described above, since the driving state of the vehicle C is presented based on an objective index, the level of satisfaction of the driver of the vehicle C based on the presented information is improved. be able to.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and appropriate modifications may be made without departing from the spirit of the present invention. it can.

  Each of the above devices has a computer inside. The process of each device described above is stored in a computer-readable recording medium in the form of a program, and the above-described processing is performed by the computer reading and executing the program. Here, the computer-readable recording medium means a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, or the like. Further, the computer program may be distributed to the computer via a communication line, and the computer that has received the distribution may execute the program.

The program may be for realizing a part of the functions described above.
Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, what is called a difference file (difference program) may be sufficient.

  DESCRIPTION OF SYMBOLS 1, 1a ... Driving evaluation system, 10 ... In-vehicle 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 ... Frequency calculation section for each display coordinate, 260 ... Display data generation section, 270 ... Driving state determination section, DP ... Display, PR ... Printer, C ... Vehicle, AD ... Acceleration data, DCR ... Display coordinate reference value, DC ... Display coordinates Determination result, CV: frequency calculation result, ER: evaluation reference value, GD: display data, Oa: acceleration origin, Ya: longitudinal acceleration axis, Xa: lateral acceleration axis, d ... back and forth direction display coordinate axis, Xd ... left and right direction display coordinate axis

Claims (5)

An acquisition unit for acquiring acceleration data in which acceleration in the longitudinal direction of the vehicle and acceleration in the lateral direction of the vehicle are respectively measured;
Based on acceleration class information in which a class of acceleration magnitude in the longitudinal direction of the vehicle and a class of acceleration magnitude in the left-right direction of the vehicle are determined in advance, the acceleration data indicated by the acceleration data acquired by the acquisition unit A determination unit for determining a class of size for each of the front-rear direction and the left-right direction;
Coordinates indicated by a vertical axis indicating a class of acceleration in the longitudinal direction of the vehicle and a horizontal axis indicating a class of acceleration in the horizontal direction of the vehicle, as display elements indicating the class of acceleration magnitude determined by the determination unit A display data generation unit for generating display data to be displayed on a plane;
A driving evaluation apparatus comprising: The display data is
The driving evaluation apparatus according to claim 1, wherein the positive direction of the vertical axis represents a forward acceleration generated in the vehicle, and the negative direction of the vertical axis represents a backward acceleration generated in the vehicle. 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 each acceleration magnitude class based on a result of determining each acceleration magnitude class. A frequency calculation unit for calculating the frequency of appearance of the magnitude class,
The display data generation unit
The driving evaluation apparatus according to claim 1 or 2, wherein display data for generating information indicating the appearance frequency calculated by the frequency calculation unit on the coordinate plane is generated. The driving evaluation device according to any one of claims 1 to 3, wherein the display data includes information indicating an evaluation stage as a characteristic value corresponding to the class. The driving evaluation device according to claim 4, further comprising: an evaluation unit that evaluates a driving state of the vehicle based on a result of the determination unit determining a class of the magnitude of the acceleration and the evaluation stage.