JP2016139204A - Risk level display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a risk level display device which is capable of displaying risk levels of a plurality of risks on a road where an own vehicle is scheduled to travel.SOLUTION: A risk level display device comprises: a display part (7) which has, according to a road where an own vehicle is scheduled to travel, has different display positions for distances and required travel times from the own vehicle to points on the road; risk level acquisition means for acquiring risk levels at the points; and display control means for respectively controlling colors (expressed by densities of dots in the figure) in the display positions of the display part to colors corresponding to the risk levels at the points acquired by the risk level acquisition means.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a risk display device that displays a risk (that is, a risk) on a road on which the host vehicle is scheduled to travel.

  2. Description of the Related Art Conventionally, as an apparatus for displaying the degree of danger associated with travel of a vehicle, an apparatus that changes the length of a bar graph according to the inter-vehicle distance or the vehicle head time between the host vehicle and a preceding vehicle or a following vehicle has been proposed. In such an apparatus, it has also been proposed to change the color of the bar graph in accordance with the degree of risk calculated according to, for example, the deceleration state of the preceding vehicle (see, for example, Patent Document 1).

JP-A-9-54900

  However, the types of danger for which the degree of danger can be displayed by the configuration of Patent Document 1 is limited to a collision with a preceding vehicle or a following vehicle. The present invention has been made in view of these problems, and it is also possible to deal with a plurality of dangers on the road on which the host vehicle is scheduled to travel, for example, a preceding car and other dangers existing beyond the preceding car. The purpose is to provide technology that can display the risk level.

  The risk level display device according to the present invention includes a display unit (7) that corresponds to a road on which the host vehicle is scheduled to travel and has different display positions depending on the distance or required time from the host vehicle to each point on the road. The risk level acquisition means (10, S1) for acquiring the risk level at each point, and the color corresponding to the risk level at each point acquired by the risk level acquisition means is the color at each display position of the display unit. And display control means (10, S7) for controlling each of them.

  In the present invention configured as described above, the display unit for displaying the danger includes the following display unit. That is, the display unit corresponds to the road on which the host vehicle is scheduled to travel, and has different display positions depending on the distance or required time from the host vehicle to each point on the road.

  The degree of risk at each point on the road on which the host vehicle is scheduled is acquired by the risk level acquisition means. Then, the display control unit controls the color at each display position of the display unit to a color corresponding to the risk level at each point acquired by the risk level acquisition unit. For this reason, in the present invention, the degree of danger can be displayed for each danger at each point on the road where the host vehicle is scheduled to travel. Therefore, it is possible to display the degree of danger for a plurality of dangers on the road on which the host vehicle is scheduled to travel.

  In addition, the code | symbol in the parenthesis described in this column and a claim shows the correspondence with the specific means as described in embodiment mentioned later as one aspect, Comprising: The technical scope of this invention is shown. It is not limited.

It is a mimetic diagram showing the instrument panel of vehicles in a 1st embodiment. It is a block diagram showing the control system of the display part of the instrument panel. It is a flowchart showing the process which concerns on the said display part in the control system. It is a mimetic diagram showing the example of existence of danger to the vehicles. It is a schematic diagram showing the example of a display of the said display part with respect to the presence example of the danger. It is a schematic diagram showing the other example of a display with respect to the example of the presence of the danger. It is a schematic diagram showing the example of a display of the said display part with respect to the example of presence of another danger. It is a flowchart showing the process which concerns on the said display part of 2nd Embodiment. It is a schematic diagram showing the example of a display with respect to the example of the said danger by the process. It is a flowchart showing the process which concerns on the said display part of 3rd Embodiment. It is a schematic diagram showing the example of a display with respect to the example of the said danger by the process. It is a block diagram showing the modification of the said control system.

Embodiments to which the present invention is applied will be described below with reference to the drawings.
[1. First Embodiment]
[1-1. Constitution]
As shown in FIG. 1, a display unit 7 for displaying the degree of danger is provided between the speedometer 3 and the tachometer 5 in the instrument panel 1 of the vehicle C (see FIG. 4) of the present embodiment. ing. The display unit 7 is configured by, for example, a color liquid crystal display device. Note that the speedometer 3 and the tachometer 5 may also be configured by a color liquid crystal display device integrated with the display unit 7 or the like.

  As shown in FIG. 2, the display state of the display unit 7 is controlled by a risk calculation device 10 that calculates the risk on the road D (see FIG. 4). Hereinafter, the configuration of the control system centered on the risk calculation device 10 relating to the display unit 7 will be described.

  Information from the V2X (vehicle-to-X) communication device 11, the mobile communication device 12, and the broadcast receiver 13 is input to the risk calculation device 10 as vehicle external information. The V2X communication device 11 performs communication between various vehicle communication devices provided in other vehicles, pedestrians, roadside devices, and the like and the vehicle C in which the V2X communication device 11 is provided. The information acquired by the V2X communication device 11 includes information indicating that the brake is applied in the other vehicle. The mobile communication device 12 communicates with various mobile devices such as a mobile phone, a smartphone, and a tablet terminal. The information acquired by the mobile communication device 12 includes wide area weather information and event information. The broadcast receiver 13 receives various broadcasts such as traffic information. The information acquired by the broadcast receiver 13 includes traffic jam information, regulation information, fallen object information, and the like on the road D.

  In addition, information from the sensing information acquisition unit 15, the electronic map storage unit 16, the statistical information storage unit 17, and the own vehicle information acquisition unit 18 is input to the risk level calculation device 10 as vehicle internal information. The sensing information acquisition unit 15 is a camera, radar, or other various sensors mounted on the vehicle C, and acquires information obtained by monitoring the periphery of the vehicle C including the road slip state. In addition, the sensing information acquisition unit 15 may include a driver status monitor that detects a driver's arousal state and the like. The electronic map storage unit 16 stores an electronic map including information such as a curve point, a lane number decreasing point, a school zone area, a railroad crossing point, an interchange or junction junction. The statistical information storage unit 17 stores statistical information such as frequent accident points, frequent sudden braking points, and routes on which many large vehicles travel. Note that the electronic map and the statistical information may be acquired from another vehicle, a roadside device, or the like via the V2X communication device 11. The own vehicle information acquisition unit 18 is a vehicle speed, position, traveling direction, type of road being traveled, time, travel route, road under which the host vehicle is traveling, or a road below the elevated road. Get information such as whether there is. The vehicle information acquisition unit 18 may use a known configuration such as a GNSS (Global Navigation Satellite System).

  Thus, information outside the vehicle is acquired as the vehicle external information via the V2X communication device 11, the mobile communication device 12, or the broadcast receiver 13. More specifically, position information of other vehicles, position information of beacons held by pedestrians, weather information, fallen object information, and the like are acquired. In addition, the acquired information includes hazard attribute information (for example, information on whether it is a pedestrian, a bicycle, another vehicle, or if it is a large vehicle, a regular vehicle, a two-wheeled vehicle, etc.) Position information indicating the presence location of the danger or polygon information indicating the presence area of the danger is included. The information acquired by the sensing information acquisition unit 15 includes information such as obstacles, pedestrians, and other vehicles acquired via a radar or a camera.

[1-2. processing]
Next, processing executed by the risk calculation device 10 will be described. The risk calculation device 10 is constituted by a microcomputer having a CPU, a ROM, and a RAM, and the CPU repeatedly executes the processing shown in the flowchart of FIG. 3 at a predetermined cycle based on a program stored in the ROM. To do.

  In this process, first, in S1 (S represents a step: the same applies hereinafter), the risk degree is calculated using, for example, a list cost table shown in Table 1 below for each point on the road D on which the vehicle C is scheduled to travel. Is calculated. The road D to be traveled is each information acquired by the host vehicle information acquisition unit 18 (specifically, the position of the host vehicle, the travel direction, and whether the road on which the host vehicle is traveling is an elevated road) Etc.) and an electronic map stored in the electronic map storage unit 16 is estimated. Further, when the vehicle C includes a car navigation device (not shown) and a route is set in the car navigation device, the road D scheduled to travel may be estimated based on the set route.

  In the example of Table 1, the presence / absence of a pedestrian, the presence / absence of a bicycle, the presence / absence of another vehicle, and the like are set as a large classification using autonomous sensing by the sensing information acquisition unit 15 as an information source. The presence / absence of another vehicle is further classified into a medium classification such as whether the vehicle is a large vehicle, a regular vehicle, or a two-wheeled vehicle.

  In addition, the major classifications of communication / broadcast acquired via the V2X communication device 11, the mobile communication device 12, and the broadcast receiver 13 as information sources include the presence / absence of a fallen object, the presence / absence of a faulty vehicle, and congestion. Presence or absence, weather, etc. are set.

  Major classifications using the electronic map (that is, map information) acquired from the electronic map storage unit 16 as information sources include the presence / absence of curves, the presence / absence of merging, and pedestrian non-separable roads where the sidewalk and roadway are not separated. Whether the road has no median, whether it is a commercial area, or the like. As a large classification using statistical information acquired from the statistical information storage unit 17 as an information source, whether or not it is an accident frequent occurrence point, whether or not it is a sudden brake frequent occurrence point, and the like are set. The statistical information classification may include a point where a so-called near-miss is detected.

  Although omitted in Table 1, a cost value corresponding to the degree of danger is set for each of these dangers. And in S1, the cost value according to the various information input into the risk calculation apparatus 10 is totaled for every point of the road D, and the total risk of each point is calculated.

  In subsequent S3, it is determined whether or not a risk level greater than the specified value is calculated in S1, and if a risk level greater than the specified value is calculated (S3: Y), the process proceeds to S5. In S5, the distance to each point where the risk is calculated is calculated. In subsequent S7, the display unit 7 is controlled to perform display according to the degree of risk and the distance, and the process is temporarily ended.

  For example, as shown in FIG. 4, it is assumed that rain R falls on the end of a road D on which the vehicle C is to travel, and that a falling rock S exists in a part of the region where the rain R falls. Then, the risk level becomes the highest at the point where the rock fall S exists, and the area where the rain R around it has also has the next risk level.

  In this case, in S7, for example, a display as shown in FIG. In the display example shown in FIG. 5, the vehicle position 71 is displayed at the center of the lower end of the display unit 7, and a road outline 72 extending upward from the periphery of the vehicle position 71 is displayed. The road contour 72 is displayed in a trapezoidal shape by applying a perspective method so that the distance from the upper side to the upper side of the road contour 72 decreases as it goes upward. Further, scale lines 73 representing the distance to each point are displayed in the margins of the display unit 7 on both the left and right sides of the road outline 72. It should be noted that the scale line 73 may be changed to one indicating the required time to each point (that is, the vehicle head time) as desired. As shown in FIG. The display such as “km” may be turned off by a driver's switch operation or the like. Further, the interval between the scale lines 73 may vary between traveling on a highway (including urban highway) and traveling on a general road.

  As shown in FIG. 5, the risk calculated in S <b> 1 for each point is displayed in color inside the road contour 72 schematically displayed as described above. In FIG. 5, the density of dots is expressed for convenience, but in reality, a color gradation display is performed such that a dense portion of dots is red, a sparse portion is light blue, and a middle portion is yellow. The display colors of the display positions inside the road outline 72 are controlled in the order of red, orange, yellow, light green, and light blue in descending order of risk. In the example of FIG. 4, for example, at a point where rain R falls and rockfall S is present, the danger level is displayed in red, and at a point where rain R is falling but rockfall S is not present, the risk level is displayed. Is orange or yellow, and the danger level is light blue at other points.

  In the example of FIG. 4, other vehicles and pedestrians are not considered, but when these are taken into consideration, the display becomes more complicated, for example, a red island is formed on the display of the display unit 7. For example, when a preceding vehicle requiring attention is traveling in front of the vehicle C and the above-described rock fall S exists further, the display positions corresponding to the position of the preceding vehicle and the position of the rock fall S are red. Controlled.

  Moreover, the display of the display part 7 is also changed at any time by repeatedly performing the process of FIG. For example, when the vehicle C is approaching a point with a high degree of danger, the red part inside the road outline 72 of the display unit 7 is also scrolled downward and approaches the host vehicle position 71. This shows that the driver is approaching a high risk point. Further, when the vehicle C cannot proceed along the road due to a dead end or a T-shaped road, a special hatching portion 74 may be displayed on the upper portion of the road contour 72 as illustrated in FIG. The hatching portion 74 may be, for example, a gray single color display (so-called solid).

  Returning to FIG. 3, if there is no point on the road D where the degree of risk is greater than the specified value (S3: N), the process directly proceeds from S3 to S7. Then, the display colors of all the display positions inside the road outline 72 on the display unit 7 are controlled to light blue. That is, the display color of the entire interior of the road contour 72 is controlled to light blue corresponding to the risk level equal to or less than the specified value. For this reason, the driver knows that the road D scheduled to travel is in a relatively safe state. The display unit 7 may display traffic information, fuel consumption information, outside temperature, and the like instead of the risk level by screen switching.

[1-3. effect]
According to the first embodiment described in detail above, the following effects can be obtained.
[1A] The color inside the road outline 72 in the display unit 7 is controlled to a color corresponding to the degree of risk at the point corresponding to each display position. For this reason, in this embodiment, the danger level can be displayed for each danger at each point on the road D on which the vehicle C is scheduled to travel. Therefore, the degree of danger can be displayed for a plurality of dangers on the road D on which the vehicle C is scheduled to travel. For example, even when there is another danger ahead of the point where the danger exists due to the presence of the preceding vehicle, the display positions corresponding to both points can be displayed in red or the like.

  [1B] In the embodiment, the overall risk level at each point on the road D is acquired according to the risk level acquired for each risk type using the risk cost table (S1). . And the color in each display position of the display part 7 is controlled to the color corresponding to the comprehensive risk (S7). For this reason, it is possible to inform the driver of the degree of danger well even for a complex danger in which various kinds of dangers overlap.

In the embodiment, the risk level calculation device 10 corresponds to an example of a risk level acquisition unit and a display control unit, and among the processes of the risk level calculation device 10, the process of S1 is an example of the risk level acquisition unit. This process corresponds to an example of the display control means.
[2. Second Embodiment]
[2-1. Difference from the first embodiment]
Since the basic configuration of the second embodiment is the same as that of the first embodiment, the description of the common configuration will be omitted, and the description will focus on the differences.

  In the first embodiment described above, the distance to the point where the degree of risk is calculated is calculated in S5. On the other hand, in the second embodiment, as shown in the flowchart of FIG. 8, in S5A instead of S5, the distance to the point where the degree of risk is calculated and the position in the road width direction are calculated. This is different from the first embodiment. Then, in the display output in S7, as shown in FIG. 9, a display reflecting the distribution of the degree of risk in the road width direction is made on the display unit 7. In the example of FIG. 4, since the falling rock S exists on the right side of the road D, the display unit 7 is controlled so that the red display color is shifted to the display position on the right side of the road outline 72.

[2-2. effect]
For this reason, in this embodiment, in addition to the effects [1A] and [1B] of the first embodiment, the following effects can be obtained. In the present embodiment, the driver can be informed not only of the distribution of how much danger is ahead on the road D scheduled to travel, but also the distribution of the danger in the road width direction.

[3. Third Embodiment]
[3-1. Difference from the first embodiment]
Since the basic configuration of the third embodiment is the same as that of the first embodiment, the description of the common configuration will be omitted, and the description will focus on the differences.

  In the first embodiment described above, the shape of the road outline 72 displayed on the display unit 7 is a trapezoid regardless of the actual shape of the road D. In contrast, the third embodiment differs from the first embodiment in that the road contour acquisition / display processing by S0 is executed prior to the processing of S1, as shown in the flowchart of FIG. In the process of S0, based on the electronic map acquired from the electronic map storage unit 16, the contour of the road D on which the vehicle C is scheduled to travel (for example, which side is curved) is acquired and corresponds to the road contour. The road outline 72 is displayed on the display unit 7. As a result, as illustrated in FIG. 11, the display position disposed inside the road contour 72 and whose color is controlled also corresponds to the actual contour of the road D.

[3-2. effect]
For this reason, in this embodiment, in addition to the effects [1A] and [1B] of the first embodiment, the following effects can be obtained. In the present embodiment, the display according to the actual contour on the road D to be traveled is performed, so that the driver can better understand the risk distribution state. The road contour 72 reflects not only the presence or absence of a curve as described above, but also changes in various road shapes such as a decrease in the number of lanes and whether the road is an elevated road or a road on the ground. May be.

[4. Other Embodiments]
As mentioned above, although embodiment of this invention was described, this invention can take a various form, without being limited to the said embodiment.

  [4A] In each of the above embodiments, the V2X communication device 11, the mobile communication device 12, the broadcast receiver 13, the sensing information acquisition unit 15, the electronic map storage unit 16, the statistical information storage unit 17, and the own vehicle information acquisition Although the risk degree of each point is calculated using the information from the part 18, it is not limited to this. For example, the risk level may be calculated using some of them, and the risk level may be calculated using other information. The statistical information storage unit 17 may also store information on the road on which the host vehicle has traveled in the past (for example, whether or not the vehicle has been frozen).

  [4B] In each of the embodiments described above, the degree of danger at the point corresponding to the display position is expressed by the color of each display position of the display unit 7, but the present invention is not limited to this. For example, the degree of danger may be expressed by shades of colors such as gray scale, and the degree of danger may be expressed by density of dots. In that case, the display unit 7 may be a monochrome display unit. In other words, the term “color” in the claims is a concept that includes not only hue but also shade and dot density.

  When the degree of danger is expressed by color shading or dot density, the color (ie, hue) is changed according to the type of danger (for example, whether the target is a person, a vehicle, an obstacle, or a road surface). The degree of danger may be expressed for each kind of danger by the density or density of the dots of each color. Further, when the traffic information is displayed on the same screen as the risk level, confusion may be suppressed by changing one of them to a display form such as monochrome.

  [4C] In each of the embodiments described above, the display unit 7 has a two-dimensional display position, but the present invention is not limited to this. For example, the display unit may be linear, or may be one in which display positions are arranged in one row without having a width in the left-right direction (that is, the road width direction). Further, a display with a sense of depth may be made using a mirror or the like, and a distant part may be shown as a distant area.

  [4D] In each of the above embodiments, the degree of danger is notified to the driver only through the display unit 7, but the present invention is not limited to this. For example, as shown in FIG. 12, an HMI (Human Machine Interface) other than the display unit 7 may be used to inform the driver of the degree of danger. In the example of FIG. 12, an HMI control unit 20 that comprehensively controls various HMIs is connected to the risk calculation device 10, and in addition to the display unit 7, an audio output unit 22, vibration generation is connected to the HMI control unit 20. The unit 23 and another HMI 24 are connected.

  In this case, the HMI control unit 20 controls the display state of the display unit 7 as in each of the embodiments described above, and generates a warning sound in the audio output unit 22 when the degree of danger is high and imminent. Control is performed to give vibration to the steering wheel or the driver's seat via the vibration generator 23. In that case, in addition to the display on the display unit 7 similar to that in each of the above embodiments, the alarm sound generated by the audio output unit 22 or the vibration generated by the vibration generation unit 23 on the steering wheel or the driver's seat may be used. You can tell the degree.

  Further, in this case, when a predetermined operation such as pressing a button or instructing by voice is performed by the driver, the detailed content of the detected danger is displayed on the display unit 7, or the content is displayed on the audio output unit 22. It is also possible to control the output via voice.

  [4E] In each of the above embodiments, the risk level is calculated using the list cost table shown in Table 1, but the present invention is not limited to this. For example, the vehicle speed of the host vehicle and the vehicle speed of other vehicles may be further reflected in the risk level. Further, without using the risk cost table, the degree of risk may be calculated by another mathematical formula or the like.

  [4F] In each of the above embodiments, a cost value is calculated for each of a plurality of events (ie, types of danger), and the total risk level is calculated by adding the cost value. However, the present invention is not limited to this. . For example, the degree of risk corresponding to only a single event (for example, the presence or absence of another vehicle) may be displayed on the display unit 7. Also in this case, for example, when the vehicle ahead of the preceding vehicle suddenly stops, the degree of risk can be displayed for a plurality of dangers (in this case, the preceding vehicle and the vehicle that has stopped suddenly).

  [4G] In each of the above embodiments, the degree of risk is displayed on the display unit 7 provided in the instrument panel 1, but the present invention is not limited to this. For example, the same display may be performed on a display unit of a car navigation device or a head-up display.

  [4H] The degree of risk calculated for each point as in each of the above embodiments may be applied to other uses as well as notifying the driver of where the danger exists. For example, when the configuration of each of the above embodiments is applied to a vehicle having an automatic driving function, the calculated risk degree is also detected in the control for detecting how long automatic driving cannot be performed later and displaying it on the driver. Can be applied. In addition, when the vehicle changes lanes during automatic driving, the driver may be suspicious as to `` Why do you change lanes ''? There is also an effect that you can understand and feel safe.

  [4I] The risk display device of the present invention (the display unit 7 and the risk calculation device 10 in the above embodiment) is configured as a so-called in-vehicle device mounted on the vehicle C, but is not limited thereto. . For example, the risk level display device of the present invention may be configured by a so-called carry-in device such as a smartphone or a tablet terminal brought into the vehicle C.

  [4J] The functions of one component in the embodiment may be distributed as a plurality of components, or the functions of a plurality of components may be integrated into one component. Further, at least a part of the configuration of the embodiment may be replaced with a known configuration having the same function. Moreover, you may abbreviate | omit a part of structure of the said embodiment. In addition, at least a part of the configuration of the embodiment may be added to or replaced with the configuration of the other embodiment. In addition, all the aspects included in the technical idea specified only by the wording described in the claim are embodiment of this invention.

  [4K] In addition to the risk level display device described above, a system including the risk level display device as a component, a program for causing a computer to function as the risk level display device, a medium on which the program is recorded, a risk level display method, and the like The present invention can also be realized in various forms.

DESCRIPTION OF SYMBOLS 7 ... Display part 10 ... Risk degree calculation apparatus 11 ... V2X communication apparatus 12 ... Mobile communication apparatus 13 ... Broadcasting receiver 15 ... Sensing information acquisition part 17 ... Statistical information storage part 18 ... Own vehicle information acquisition part 20 ... HMI control Part 22 ... Audio output part 23 ... Vibration generating part 72 ... Road outline 73 ... Scale line C ... Vehicle D ... Road

Claims (5)

A display unit (7) corresponding to a road on which the host vehicle is scheduled to travel, and having different display positions depending on the distance or required time from the host vehicle to each point of the road;
A risk acquisition means (10, S1) for acquiring the risk at each point;
Display control means (10, S7) for controlling the color at each display position of the display unit to a color corresponding to the risk at each point acquired by the risk acquisition means;
A risk level display device characterized by comprising: The display unit two-dimensionally includes different display positions depending on the distance or required time from the host vehicle to each point of the road and the position in the width direction of the road,
The risk level acquisition unit acquires at least two-dimensionally the risk level at each point of the road where at least one of the distance, the required time, or the position in the width direction is different. The danger level display device according to claim 1.   The display control means selects a plurality of display positions arranged according to the shape of the road from the display positions provided in the display unit, and changes the color at the selected display position according to the risk level. The risk display device according to claim 2, wherein the risk degree display device is controlled to a color.   The risk level display device according to any one of claims 1 to 3, wherein the risk level acquisition unit acquires the risk level on the road individually for each type of risk. The risk level acquisition means acquires a total risk level on the road according to the risk level acquired individually for each type of the risk,
The risk display device according to claim 4, wherein the display control means controls the color at each display position to a color corresponding to the total risk.