JP2010127734A - Warning device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a warning device of which the warning display abounds in variation and which facilitates grasping of the situation of excess of speed for a driver. <P>SOLUTION: This warning device is carried on board a vehicle and issues the driver a warning that a vehicle speed exceeds the speed limit. The device includes a vehicle speed sensor 210, which detects the vehicle speed of the vehicle; a navigation system part 800, which acquires information relating to the speed limit of a road on which the vehicle runs; a penalty information acquiring part which acquires penalty information regarding penal regulations from the relation between the vehicle speed detected by the vehicle speed sensor 210 and the speed limit acquired by the navigation system part 800; and an interface part 600, which displays a difference amount corresponding to the difference between the vehicle speed detected by the vehicle speed sensor 210 and the speed limit acquired by the navigation system part 800, a speed limit value and the penalty information. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a warning device that is mounted on a vehicle and warns a driver that the vehicle speed exceeds a speed limit.

  With the widespread use of GPS-based car navigation systems, it has become easier to acquire road information on which a vehicle is traveling, and it has become possible to acquire information on the speed limit of a traveling road. Along with this, there has been proposed a warning device that determines whether the current vehicle speed exceeds the speed limit and warns the driver if the vehicle speed exceeds the speed limit by the determination. .

For example, Patent Document 1 (Japanese Patent Laid-Open No. 2007-199026) discloses vehicle speed acquisition means for acquiring the vehicle speed of a vehicle, speed limit acquisition means for acquiring a speed limit of a traveling road while traveling, and the vehicle speed. The dial including the vehicle speed scale and the vehicle speed display number and the pointer can be rewritten and displayed as an image, the dial is displayed with the vehicle speed scale corresponding to the speed limit set at a predetermined position, and the pointer is analog There is disclosed a vehicle speed display device comprising: display means for rotating and displaying the vehicle speed.
JP 2007-199026 A

  However, in the warning by the vehicle speed display device described in Patent Document 1, the speed limit is always displayed by the same monotonous display method, so that the driver's interest in the display is reduced. There was a problem that the meaning of the warning may not be realized.

  Moreover, in the warning by the prior art described in patent document 1, since there is no change in a display in the display method, there exists a problem that it is hard to understand an excess condition change.

  In order to solve the above problem, the invention according to claim 1 is a warning device that is mounted on a vehicle and warns a driver that the vehicle speed exceeds a speed limit, and the vehicle speed of the vehicle is reduced. Acquired by a vehicle speed detection unit to detect, a speed limit information acquisition unit for acquiring information related to a speed limit of a road on which the vehicle travels, a vehicle speed detected by the vehicle speed detection unit and the speed limit information acquisition unit It corresponds to the difference between the penalty information acquisition unit that acquires the penalty information related to the penalty from the relationship with the determined speed limit, and the vehicle speed detected by the vehicle speed detection unit and the speed limit acquired by the speed limit information acquisition unit And a display unit that displays the difference amount, the speed limit value, and the penalty information.

  According to a second aspect of the present invention, in the warning device according to the first aspect, the difference amount is larger when the excess speed calculated by the vehicle speed and the speed limit is large than when the excess speed is small. And a predetermined warning color is determined based on the excess speed.

According to the warning device according to the present invention, by making a warning display regarding the speed limit at a timing after exceeding the speed, it becomes easier for the driver to recognize whether the speed has been exceeded,
The driver's interest in the warning display will not fade and the warning will not be meaningful.

  Further, according to the warning device according to the present invention, when performing warning display, as a warning display method, in order to change the display, it is easy for the driver to grasp the change related to the overspeed situation. There is a merit.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing an outline of a vehicle equipped with a warning device according to an embodiment of the present invention, and FIG. 2 is a diagram showing an outline of a block configuration of the warning device according to an embodiment of the present invention. In addition, although the warning device of this embodiment assumes mounting in vehicles, such as a motor vehicle, a hybrid vehicle, and an electric vehicle, it can also be mounted in another moving means.

  1 and 2, 10 is a vehicle, 32 is a steering wheel, 54 is an accelerator pedal, 100 is an ECU, 200 is a travel information acquisition unit, 210 is a vehicle speed sensor, 400 is a vehicle periphery information acquisition unit, 410 is a millimeter wave radar, 420 is a camera, 500 is a driving operation unit, 510 is an accelerator opening sensor, 540 is an accelerator reaction force control unit, 560 is a steering vibration control unit, 600 is an interface unit, 610 is a display, 630 is a speaker, and 800 is a navigation system unit. 810 denotes a navigation system, and 820 denotes a navigation database.

  The vehicle 10 is equipped with the warning device of the present invention and will be described by taking as an example a vehicle that runs using ordinary gasoline as fuel and an engine as a power source. As described above, the warning device of the present invention is mounted. The type of vehicle to be used is not limited to this.

  The ECU 100 is an abbreviation for an electronic control unit, and is a general-purpose information processing mechanism including a CPU, a ROM that holds a program that operates on the CPU, and a RAM that is a work area of the CPU. Further, as is well known, such an ECU 100 naturally includes a timekeeping unit as shown in a block diagram. ECU 100 cooperates and operates with each component connected to ECU 100 shown in the block diagram. In addition, the ECU 100 executes various control processes in the warning device of the present invention based on programs and data stored and held in storage means such as a ROM in the ECU 100.

  “Warning grace time setting unit” and “timer unit” described in the claims express the operation of the ECU 100 in a high-level concept. Moreover, it is based on the operation | movement regarding the determination described in the claim, and the function of ECU100. In the present embodiment, each of the above means is realized by the ECU 100 and a program executed on the ECU 100. However, these means are not limited to this, and hardware such as a logic circuit is used. It may be realized only by wear.

  The travel information acquisition unit 200 is configured to acquire information related to actual travel of the vehicle 10, and is provided with at least a vehicle speed sensor 210, and senses the speed of the vehicle 10 (own vehicle speed). ing. Based on the vehicle speed acquired by the vehicle speed sensor 210, the ECU 100 or the like can calculate the acceleration of the vehicle. Note that as the travel information acquisition unit 200, other sensors such as a gyro may be provided.

The vehicle surrounding information acquisition unit 400 is configured to acquire information on the outside of the vehicle 10 and the like around the vehicle 10. In this embodiment, the vehicle surrounding information acquisition unit 400 includes a millimeter wave radar 410 and a camera 420 on the front side and the rear side of the vehicle 10. . The millimeter wave radar 410 measures a distance between a vehicle traveling in front of the vehicle 10 and an obstacle. The distance between the front vehicle and the rear vehicle measured here is E
Input to CU100. Further, from the measured inter-vehicle distance and the speed information of the host vehicle acquired by the vehicle speed sensor 210, the ECU 100 determines the relative speed obtained by subtracting the speed of the host vehicle from the speed of the vehicle traveling forward and rearward of the host vehicle. Perform calculations.

  In addition, the camera 420 acquires an image relating to a vehicle, an obstacle, or a road surface traveling in front. The acquired image data is transmitted to the ECU 100, and image analysis is performed by the ECU 100, thereby obtaining, for example, distance information with respect to the preceding vehicle, acquiring the traveling status of surrounding vehicles, or determining the road surface state. To obtain the coefficient of friction of the road surface.

  Based on the information acquired by the vehicle surrounding information acquisition unit 400 as described above and information obtained by the navigation system unit 800 described later, the driving operation of the driver is predicted. Note that the “vehicle surrounding state acquisition unit” described in the claims expresses the configuration of the vehicle surrounding information acquisition unit 400 and the like in a high-level concept.

  The driving operation unit 500 has a configuration related to driving of the vehicle 10. In the warning device according to the present invention, the driving operation unit 500 includes, for example, an accelerator opening sensor 510, an accelerator reaction force control unit 540, and a steering vibration control unit 560. Yes.

  The accelerator opening sensor 510 detects the depression amount (angle) of the accelerator pedal 54. The accelerator reaction force control unit 540 generates a force (arrow A in FIG. 1) against the driver's depression of the accelerator pedal 54 by an actuator (not shown) or the like, and this force is applied to the accelerator pedal 54 as an accelerator reaction force. It is a control unit that communicates. Such an accelerator reaction force control unit 540 is instructed by the ECU 100 to prevent excessive fuel consumption. By such an accelerator reaction force control unit 540, the driver feels the reaction force from the accelerator pedal 54 and is notified that his / her driving is out of the speed limit.

  Further, the reaction force generated by the accelerator reaction force control unit 540 pushes back the accelerator pedal 54 by the driver and avoids further sudden acceleration of the vehicle 10.

  The steering vibration control unit 560 is mounted on the steering 32 operated by the driver of the vehicle 10 and performs control to apply vibration to the palm of the driver, and the steering vibration control unit 560 operates. Thus, it is possible to notify the driver that the vehicle is out of the speed limit.

  The interface unit 600 is provided in a driver seat of the vehicle 10 and is configured to provide information related to the vehicle 10 to the driver. A display 610 in the interface unit 600 is a display device such as a liquid crystal. By displaying character / graphic information on the display 610, it is possible to visually notify the driver of predetermined information. Such a display 610 allows the driver of the vehicle 10 to visually receive information from the warning device according to the present invention, such as that the speed of the vehicle 10 exceeds the speed limit. There are various possible ways of displaying the warning display related to exceeding the speed limit. A specific display method of the warning display for the driver on the display 610 will be described in detail later. The “warning part” and “display part” described in the claims express the configuration of the display 610 and the like in a high-level concept.

  The interface unit 600 also includes a speaker 630 so that voice guidance and warning can be given to the driver as necessary. Both the display 610 and the speaker 630 of the interface unit 600 can function as notification means when the driving operation exceeds the speed limit.

  The navigation system unit 800 includes a navigation system 810 and a navigation database 820 such as map information and road information referred to by the navigation system 810. The navigation system 810 can acquire current position information of the vehicle by using a GPS positioning unit that receives a GPS signal from a GPS satellite and calculates its own position. The navigation database 820 includes road information in addition to map information and facility information. Such road information includes information on the number of road lanes, presence / absence of merging, road speed limit, and the like. The navigation system 810 acquires current position information, By referring to it, it becomes possible to grasp the situation of the road on which the vehicle is traveling, the speed limit, and the like. The “restricted speed information acquisition unit” described in the claims expresses the operation of the navigation system unit 800 in a high-level concept. In the warning device of the present invention, other positioning methods can be used as long as the position information can be acquired without using such a GPS positioning method.

  Next, processing / operation of the warning device according to the present embodiment configured as described above will be described. FIG. 3 is a diagram showing a flowchart of the processing / operation of the warning device according to the embodiment of the present invention. It should be noted that the processing / operation according to such a flowchart is executed as long as the engine (not shown) of the vehicle 10 is on.

  In FIG. 3, when processing of the warning device is started in step S <b> 100, the process proceeds to step S <b> 101 and the vehicle speed of the vehicle 10 is acquired by the vehicle speed sensor 210. Subsequently, in step S102, the speed limit information of the road on which the vehicle 10 travels is acquired by executing a speed limit information acquisition process subroutine.

  Here, a subroutine of the speed limit information acquisition process will be described. FIG. 4 is a flowchart of the speed limit information acquisition processing subroutine of the warning device according to the embodiment of the present invention. In FIG. 4, when a subroutine for speed limit information acquisition processing is started in step S <b> 200, the process proceeds to step S <b> 201 and the navigation system 810 of the navigation system unit 800 acquires the current position information of the vehicle 10. In step S202, the navigation system 810 acquires speed limit information on the road on which the vehicle 10 travels from the navigation database 820 based on the current position information, and returns to the main routine in step S203.

  Returning to the main routine of FIG. 3 again, the description will be continued. In step S103, the vehicle speed acquired by the vehicle speed sensor 210 is compared with the speed limit obtained by the speed limit information acquisition process, and the magnitude relationship between them is determined. Specifically, it is determined in step S103 whether (vehicle speed)> (limit speed). If the determination in step S103 is no, the process returns to step S101. If the determination is yes, the process proceeds to step S104.

  In step S104, a warning grace time calculation process subroutine is executed to calculate "warning grace time" which is a characteristic concept in the present invention. This warning grace time indicates a predetermined time during which the driver is given a warning even after the vehicle speed of the vehicle 10 exceeds the speed limit.

A process for obtaining such a calculation of the warning grace time will be described. FIG. 5 is a flowchart of a warning postponement time calculation processing subroutine of the warning device according to the embodiment of the present invention. In FIG. 5, when the warning postponement time calculation process is started in step S300, a driving action prediction process subroutine is subsequently executed in step S301. This driving action prediction process is a process for predicting the driver's future driving action from surrounding conditions and road conditions. An algorithm of a subroutine for such processing will be described. FIG. 6 is a flowchart of the driving behavior prediction processing subroutine of the warning device according to the embodiment of the present invention. In FIG. 6, when the subroutine of the driving behavior prediction process is started in step S400, the process proceeds to step S401, and if the route setting or the like is performed in the navigation system unit 800, this information is acquired. Conventionally known concepts can be used for route setting in the navigation system. In this step, if a route is set, this information is acquired as reference information for predicting driving behavior. In step S402, information related to the road configuration is acquired from the map database of the navigation database 820. Such information is information such as how many lanes the road on which the vehicle 10 is traveling, or whether there is a merging road, and the driving behavior of the driver is predicted based on this information. . In step S403, the surrounding state information of the vehicle 10 is acquired from the millimeter wave radar 410 and the camera 420 of the vehicle surrounding information acquisition unit 400. Such information is subjected to image analysis processing so as to grasp the surrounding vehicle traveling state or the presence / absence state of a vehicle parked in front, and the driving behavior of the driver is predicted by referring to this. In step S404, based on the collected information, as a driving behavior prediction of the driver, “normal” driving behavior, “lane change” driving behavior, “join” driving behavior, “stopped vehicle avoidance” driving behavior. The driving action with the highest possibility is selected from either of these. In step S405, the process returns to the routine of the flowchart of FIG.

  Returning to the flowchart of FIG. In step S302, it is determined whether or not the driving behavior predicted by the driving behavior prediction process is “normal”. In other words, “normal” driving behavior refers to driving behavior other than “lane changing” driving behavior, “joining” driving behavior, and “stopped vehicle avoidance” driving behavior. For example, straight driving along a lane Or running on a curve. When the determination in step S302 is YES, there is no need to postpone the warning, so the process proceeds to step S304 and (warning postponement time) = 0 is set.

On the other hand, when the determination in step S302 is NO, it is a driving action such as “lane change”, “merge”, “stopped vehicle avoidance”, etc. that the driver needs to accelerate, so the overspeed warning is delayed. Set a grace period. That is, the process proceeds to step S303, where the warning postponement time T _O is calculated based on the table shown in FIG. In other words, driving behavior prediction is "lane change"
7 seconds long, 8 seconds if the "confluence", is 6 seconds if the "stop vehicle avoidance", is set as a warning grace time T _O. In step S305, the process returns to the main routine.

  As described above, in the present embodiment, by providing a warning grace time as described above, warnings for excessive speed that are not intended by the driver can be avoided, and warnings can be displayed without giving the driver more load than necessary. Will be able to.

Various methods for calculating such a warning postponement time can be considered. Next, another method for calculating the warning postponement time will be described. FIG. 8 is a view showing a flowchart of a warning grace time calculation processing subroutine of the warning device according to another embodiment of the present invention, and FIG. 9 is a chart used in a warning grace time calculation processing subroutine of the warning device according to another embodiment. FIG. In FIG. 8, when a subroutine for warning grace time calculation processing is started in step S500, the process proceeds to step S501, and information on the accelerator opening is acquired from the accelerator opening sensor 510. Then, in step S502, the accelerator opening 9 - seeking alert window time T _O from the alert window time chart, returns at step S503. In such other embodiments, when the speed limit of the vehicle 10 is exceeded, if the accelerator opening is a large value, it is assumed that the driver is intentionally accelerating, and the warning grace time is set short. If the accelerator opening is a small value, it is assumed that the driver is accelerating according to the surrounding conditions, and the warning grace time is set longer. In the method according to the present embodiment, the warning grace time may not always be set accurately according to the actual situation. However, compared with the previous method, there is an advantage that the algorithm for calculating the warning grace time is simple.

In addition, other methods for calculating the warning grace time will be described. FIG. 10 is a flowchart of a warning grace time calculation processing subroutine of the warning device according to another embodiment of the present invention, and FIG. 11 is a chart used in a warning grace time calculation processing subroutine of the warning device according to another embodiment. FIG. In FIG. 10, when the subroutine of the warning grace time calculation process is started in step S600, the process proceeds to step S601 where the acceleration of the vehicle 10 is calculated. Then, in step S602, based on the calculated acceleration, the acceleration shown in FIG. 11 - Request warning from grace time chart alert window time T _O. In the chart shown in FIG. 11, α _max indicates the maximum acceleration of the vehicle 10. In step S603, the process returns to the original routine. In such other embodiments, when the speed limit of the vehicle 10 is exceeded, if the acceleration is a large value, it is assumed that the driver is intentionally accelerating, the warning grace time is set short, If the acceleration is a small value, it is assumed that the driver is accelerating according to the surrounding situation, and the warning grace time is set longer. Even in the method according to the present embodiment, the warning grace time may not necessarily be set accurately in accordance with the actual situation. However, there is an advantage that the algorithm for calculating the warning grace time is simpler than the method of calculating the warning grace time by predicting the handing behavior.

  In the above, each method for calculating the warning grace time independently from the handling behavior prediction, accelerator opening, and acceleration has been explained above. However, the information on the handling behavior prediction, accelerator opening, and acceleration is comprehensive. It is also possible to obtain the warning grace time by an algorithm that takes into account the above.

Returning again to the main routine of FIG. 3, the description will be continued. In step S105, it is determined whether a> 0 (T _O warning margin time). If the decision result in the step S105 is NO, the process proceeds to a step S109, and a warning display processing subroutine is immediately executed to give a warning regarding the overspeed to the driver. On the other hand, if the decision result in the step S105 is YES, a predetermined warning grace time has been set, so the process proceeds to a step S106 in order to give a driver warning after the grace period.

  In step S106, the ECU 100 starts measuring time. This time measurement is defined as T. In step S107, it is determined whether (vehicle speed) <(limit speed). If the determination result of step S107 is YES, it will return to step S101, and if a determination result is NO, it will progress to step S108.

In step S108, it is determined whether or not (time keeping time T)> (warning delay time T _O ). If the determination result in step S108 is NO, the process returns to step S107 and loops. If the determination result is YES, the warning grace time has elapsed, so that a warning display should be given to the driver. The process proceeds to step S109. In step S109, a warning display processing subroutine is executed to give a warning about overspeed to the driver. The warning display processing subroutine will be described in detail later.

  According to the above configuration, the warning display regarding the speed limit is displayed at the timing after the speed is exceeded, so that the driver can easily recognize whether the speed has been exceeded. The person's interest will not fade and the warning will not make sense.

  In addition, when performing a warning display, a warning grace time is provided as necessary, so that a warning for an excessive speed that is not intended by the driver can be avoided, and the warning display can be performed without applying an unnecessary load to the driver. .

  In step S110, either one or both of the steering vibration control unit 560 and the accelerator reaction force control unit 540 are executed. Such steering vibration control unit 560 and accelerator reaction force control unit 540 are operated, and accordingly, when the driver performs a driving operation exceeding the speed limit, it is possible to appropriately notify.

  Next, the above-described warning display processing subroutine will be described. FIG. 12 is a diagram showing an example of a warning display screen on the display 610 of the warning device according to the embodiment of the present invention. As shown in FIG. 12, the warning display screen of the warning device according to the present embodiment has an annular shape, and there is a display unit that displays a numerical value at the center portion, and a plurality of display units surround the periphery of the display unit. An annular display portion (referred to as “display ring”) is provided. The center of the annular display portion is a display zone that displays the speed limit of the road on which the vehicle 10 is traveling. Around the display zone, the first display ring, the second display ring, the third display ring, A four display ring and a fifth display ring are provided. These display rings are lit in order from the first display ring. In addition, the display ring is displayed in a plurality of colors, and predetermined information is notified to the driver according to each color. In the present embodiment, the number of display rings is described based on five, but the number of display rings provided is not limited to this.

  In the embodiment shown in FIG. 12, the number of lighting of the first to fifth display rings is a number corresponding to the amount corresponding to the difference between the vehicle speed and the speed limit. Further, the level of excess speed is indicated by the lighting colors of the first to fifth display rings.

  A warning display process based on the warning display screen on the display 610 as described above will be described. FIG. 13 is a flowchart of a warning display processing subroutine of the warning device according to the embodiment of the present invention. In FIG. 13, when the warning display processing subroutine is started in step S700, the process proceeds to step S701, and the acquired speed limit of the road on which the vehicle 10 is traveling is displayed in the speed limit display zone in the center of FIG. indicate.

  In step S702, N = {(vehicle speed) − (limit speed)} / 10 is calculated. In this calculation, the decimal part is rounded down. This is because the number of display rings is a natural number. In step S703, the acceleration of the vehicle 10 is calculated.

In step S704, the display color is specified from the (speed, acceleration) point using the display color determination map of the speed limit. Here, as the display color determination map, a map corresponding to a road with a speed limit of 30 km / h, a map corresponding to a road with a speed limit of 40 km / h, a map corresponding to a road with a speed limit of 50 km / h, ... Are prepared and stored in the storage means such as the ROM described in the ECU 100. FIG. 14 is a diagram showing an example of a display color determination map with a speed limit of 50 km / h. The display color determination map in FIG. 14 has an origin on a coordinate plane with the horizontal axis representing speed and the vertical axis representing acceleration, and the origin is set to 0 km / h, and the boundary lines of the red display, yellow display, and blue display areas are accelerations with respect to speeds. It is separated by the cubic function. The display color determination map of FIG. 14 is not used except when the vehicle speed exceeds the speed limit after exceeding the warning window from step S103 and step S104. Therefore, when it is less than the warning grace time, the driver is not notified of the relationship with the speed limit regardless of the speed and acceleration, and the driver does not feel bothered. When the vehicle speed exceeds the speed limit after exceeding the warning grace time, the vehicle acceleration is accelerated or decelerated while the vehicle speed exceeds the speed limit based on the speed and acceleration according to FIG. It is possible to notify the driver of certain acceleration, deceleration, and non-acceleration / deceleration (a state where acceleration and deceleration are not performed or a range in which acceleration and deceleration are within predetermined values, respectively), so the vehicle speed is limited to the driver. Can be urged to fit inside. There is a reason for using the display color determination map of speed and acceleration and dividing the acceleration area by a cubic function of acceleration with respect to speed. For example, if the color is displayed in steps of blue, yellow, and red as it deviates from the speed limit after exceeding the speed limit, the vehicle speed that exceeds the speed limit in the first place is safe for blue, yellow, and red. It is thought that the analogy of the general concept of caution and danger works, so there is a possibility that the meaning of the warning will be lost. However, as in this embodiment, in the region where the speed exceeds the speed limit, the region where the acceleration is decelerated is blue (first warning color), and the region where the acceleration is non-accelerated is yellow (second Warning color), the area where acceleration accelerates is designed in red (third warning color), and the acceleration area is designed so that the acceleration peak decreases as the speed increases, that is, the speed By dividing the region by a cubic function of acceleration with respect to the vehicle, a warning that matches the driver's feeling and actual vehicle characteristics can be given. In this embodiment, the acceleration area is divided by a cubic function. However, the acceleration area need not be a cubic function, and acceleration increases as the vehicle speed increases on the deceleration deceleration side, the steady acceleration side, and the acceleration acceleration area. If the speed and acceleration can be divided into regions such that the acceleration becomes sharper as the vehicle speed becomes lower, the vehicle characteristics can be matched. The display color determination map of FIG. 14 is related to step S103, but there is also a method of issuing a warning to the driver only when the speed is higher than the speed limit by using only the display color determination map. In this case, when the speed limit line is drawn parallel to the acceleration axis at the speed limit and the vehicle speed is lower than the speed limit line, no color-coded area is set in the display color determination map. When the vehicle speed is higher than the speed limit line, the display color determination map area of FIG. 14 may be applied. By doing so, it is possible to issue a warning that matches the driver's feeling and actual vehicle characteristics as in FIG. In FIG. 14, for example, assuming that the vehicle 10 is traveling on a road with a speed limit of 50 km / h, in step S704, the (speed, acceleration) point in FIG. 14 is displayed in red, yellow, or blue. The color displayed in the display ring is specified by specifying whether it exists in the area. For example, (speed, acceleration) specific color when the point is present in P ₁ is a yellow, velocity, specific color when the point of the acceleration) are present in the P ₂ is set to red.

In step S705, the first display ring to the N display ring are turned on with the specific display color specified in the previous step. If there is no display ring corresponding to N, the maximum number of display rings is turned on. The number of single display rings, which is the difference amount calculated by the excess speed calculated by the vehicle speed and the speed limit, is set larger when the excess speed is large than when the excess speed is small, and the excess speed The predetermined warning color is determined based on the excess speed from the warning display table shown in FIG. When such step 705 is executed, the warning display screen on the display 610 when the point of (speed, acceleration) exists at P ₁ is as shown in FIG. 15A, and the point of (speed, acceleration) A warning display screen on the display 610 when is present at P ₂ is as shown in FIG. In step S706, the process returns to the original main routine.

  According to the above configuration, when a warning is displayed, the display method changes as the warning display method changes, such as the number of lights on the display ring. There is an advantage that it is easy to grasp.

Next, a warning display processing subroutine according to another embodiment will be described. FIG. 16 is a diagram showing an example of a warning display screen on the display 610 of the warning device according to another embodiment of the present invention. As shown in FIG. 16, the warning display screen of the warning device according to another embodiment has an annular shape, and there are a plurality of display units that display a numerical value at the center and surround the periphery. An annular display portion (referred to as “display ring”) is provided. The center of the annular display portion is a display zone that displays the speed limit of the road on which the vehicle 10 is traveling. Around the display zone, the first display ring, the second display ring, the third display ring, A four display ring and a fifth display ring are provided. These display rings are lit in order from the first display ring. In addition, the display ring is displayed in a plurality of colors, and predetermined information is notified to the driver according to each color. In the present embodiment, the number of display rings is described based on five, but the number of display rings provided is not limited to this.

  In the embodiment shown in FIG. 16, the number of lighting of the first to fifth display rings is a number corresponding to the amount related to the time measured when the vehicle speed exceeds the speed limit. Further, the level of excess speed is indicated by the lighting colors of the first to fifth display rings.

  A warning display process based on the warning display screen on the display 610 as described above will be described. FIG. 17 is a view showing a flowchart of a warning display processing subroutine of the warning device according to another embodiment of the present invention. In FIG. 17, when the warning display processing subroutine is started in step S800, the process proceeds to step S801, and the acquired speed limit of the road on which the vehicle 10 is traveling is displayed in the speed limit display zone in the center of FIG. indicate.

In step S802, N = (T−T _O ) / 20 is calculated. In this calculation, the decimal part is rounded down. This is because the number of display rings is a natural number. In step S803, the acceleration of the vehicle 10 is calculated. Although T-T _O is divided by 20, there is no special meaning in 20 and only one display of the display ring corresponds to 20 seconds.

In step S803, the display color is specified from the (speed, time) point using the display color determination map of the speed limit. Similarly, in this embodiment, the display color determination map corresponds to a road corresponding to a road with a speed limit of 30 km / h, a road corresponding to a road with a speed limit of 40 km / h, and a road corresponding to a road with a speed limit of 50 km / h. A plurality of items, etc. are prepared and held in the storage means such as the ROM described in the ECU 100. FIG. 18 is a diagram showing an example of a display color determination map with a speed limit of 50 km / h. 18, the speed on the horizontal axis, the vertical axis represents the measured time T of the origin on the coordinate plane which was the difference between the warning window time T _O to 0 km / h and the blue display, the border areas of the yellow display and red display It is divided by an elliptic function based on the difference between the speed and time count T and the warning delay time T _O. The display color determination map of FIG.
03 and from step S104, it is not used except when the vehicle speed exceeds the speed limit after exceeding the warning grace time. Therefore, when it is less than the warning grace time, the driver is not notified of the relationship with the speed limit regardless of the speed and acceleration, and the driver does not feel bothered. Then, when the vehicle speed exceeds the speed limit after exceeding the warning window, the vehicle speed exceeds the speed limit based on the time count T, the warning window time T _O and the speed according to FIG. Since the driver can be notified of the degree of excess time, which is the time during which the vehicle exceeds the limit vehicle speed, the driver can be prompted to keep the vehicle speed within the limit speed.

In the display color determination map of FIG. 18, the reason why the horizontal axis is speed and the vertical axis is an elliptic function in which the vertical time is the excess time, which is the difference between the timing time T and the warning delay time T _O , is as shown in FIG. For the same reason. That is, on the vehicle characteristics, the acceleration on the acceleration side becomes dull as the speed increases, and the acceleration on the acceleration side becomes sharper as the speed decreases. For this reason, it is designed so that the excess time becomes longer in areas where the vehicle speed is low, and the excess time is shortened in areas where the vehicle speed is high compared to areas where the vehicle speed is low. By designing the ellipses of the boundary line of the blue (first warning color) area, yellow (second warning color) area and red (third warning color) area based on the torque relationship, A display color determination map that matches the driver's feeling can be obtained. The display color determination map in FIG. 18 is related to step S103, but there is also a method of issuing a warning to the driver only when the speed is greater than the speed limit by using only the display color determination map. In this case, a speed limit line is drawn parallel to the excess time axis at the speed limit, and when the vehicle speed is lower than the speed limit line, no color-coded area is set in the display color determination map. When the vehicle speed is higher than the speed limit line, the display color determination map region of FIG. 18 may be applied. By doing in this way, it becomes possible to issue a warning that matches the driver's feeling and the actual vehicle characteristics as in FIG. 18, so such an example is also suitable. In FIG. 18, for example, if the vehicle 10 is traveling on a road with a speed limit of 50 km / h, in step S803, the point of (speed, time) in FIG. 18 is displayed in red, yellow, or blue. The color displayed in the display ring is specified by specifying whether it exists in the area. For example, the specific color is yellow when the (speed, time) point is present at P ₁ , and the specific color is red when the point (speed, time) is present at P ₂ .

In step S804, the first display ring to the N display ring are turned on with the specific display color specified in the previous step. If there is no display ring corresponding to N, the maximum number of display rings is turned on. When such a step 705 is executed, the warning display screen on the display 610 when the point of (speed, time) exists in P ₁ is shown in FIG.
The display 61 when the point of (speed, time) exists in P ₂
The warning display screen at 0 is as shown in FIG. In step S805, the process returns to the original main routine.

  According to the above configuration, when a warning is displayed, the display method changes as the warning display method changes, such as the number of lights on the display ring. There is an advantage that it is easy to grasp.

  Next, a warning display processing subroutine according to another embodiment will be described. FIG. 20 is a diagram showing an example of a warning display screen on the display 610 of the warning device according to another embodiment of the present invention. In the present embodiment, the configuration of the display zone for displaying the speed limit and the display ring is the same as the configuration described in FIG. That is, also in the embodiment shown in FIG. 20, the number of lighting of the first to fifth display rings is a number corresponding to the amount corresponding to the difference between the vehicle speed and the speed limit.

  This embodiment is different from the embodiment shown in FIG. 12 in that information related to penalty information is displayed on the upper left and right of the warning display screen. That is, a violation score display zone is provided at the upper left of the warning display screen, and a fine information display zone is provided at the upper right of the warning display screen. Moreover, the penalty level accompanying overspeed is shown by the lighting color of the 1st-5th display ring.

  A warning display process based on the warning display screen on the display 610 as described above will be described. FIG. 21 is a view showing a flowchart of a warning display processing subroutine of the warning device according to another embodiment of the present invention. In FIG. 21, when the warning display processing subroutine is started in step S900, the process proceeds to step S901, and the acquired speed limit of the road on which the vehicle 10 is traveling is displayed in the speed limit display zone in the center of FIG. indicate.

  In step S902, N = {(vehicle speed) − (limit speed)} / 10 is calculated. In this calculation, the decimal part is rounded down. This is because the number of display rings is a natural number.

In step S903, the point information is specified from (excess speed) = {(vehicle speed) − (limit speed)} and displayed on the upper left of the warning screen. Here, the table shown in FIG. 22 is used for specifying such score information. FIG. 22 is a diagram showing a relationship table between excess speed, penalties, and display ring display color. Overspeed is less than 15 km / h, 15 km / h or more but less than 20 km / h, 20 km / h or more but less than 25 km / h, 25 km / h or more but less than 30 km / h, 30 km / h or more but less than 50 km / h and 50 km / h or more. There are 6 categories. And, for each classification, information on points such as violations of the Road Traffic Law and information on fines and penalties corresponding to the points information are classified. Also, the display ring display color, which is the display color at the time of warning display, is blue when it is less than 15 km / h and 15 km / h or more and less than 20 km / h, and is 20 or more and less than 25 km / h and 25
Yellow is set at a speed of km / h or more and less than 30 km / h, and red is set at a speed of 30 km / h or more and less than 50 km / h and 50 km / h or more.

  In step S904, information such as fines is specified from (excess speed) = {(vehicle speed) − (limit speed)} and displayed on the upper right of the warning screen with reference to FIG.

In step S905, the color displayed on the display ring is specified from (excess speed) = {(vehicle speed) − (limit speed)} with reference to FIG. For example, the specific color is blue when the overspeed of the vehicle 10 is 10 km / h, and the specific color is red when it is 35 km / h. By the way, in step S902 to step S905, the excess speed is calculated with the difference between the vehicle speed and the speed limit. The limited vehicle speed is not only changed depending on the road because it is moving while traveling, but may change depending on the weather on an expressway, for example, so the limited vehicle speed acquired from the navigation system unit 800 and the current vehicle speed It is possible to present accurate penalties and the like to the driver by specifying the point information, fines and penalties information and display colors corresponding to the calculation. In addition to displaying point information and information such as fines and penalties, the first warning color, blue, the third warning color, red, and the second warning color, yellow, each violates the Road Traffic Law. Even blue tickets, red tickets, and blue tickets will be notified to correspond to those with 2 points or more deductions and heavy fines. As a result, it is possible to provide warnings that are suitable for the general concept of warnings, and to be able to specifically report damages caused by violations. Can be urged to stay within the speed limit. Note that the table (warning display table) in FIG. 22 is changed from the speed limit at any time or periodically based on the current vehicle position information of the navigation system unit 800, the navigation database 820, and the like.

  In step S906, the first display ring to the N display ring are turned on with the specific display color specified in the previous step. If there is no display ring corresponding to N, the maximum number of display rings is turned on. The number of single display rings, which is the difference amount calculated by the excess speed calculated by the vehicle speed and the speed limit, is set larger when the excess speed is large than when the excess speed is small, and the excess speed Based on the above, a predetermined warning color is determined based on the overspeed from the warning display table of FIG.

  When such step 906 is executed, the warning display screen on the display 610 when the overspeed of the vehicle 10 is 10 km / h is as shown in FIG. 23 (A), and the overspeed of the vehicle 10 is 35 km / h. The warning display screen on the display 610 at the time of is shown in FIG. In step S906, the process returns to the original main routine.

  According to the above configuration, when a warning is displayed, the display method changes as the warning display method changes, such as the number of lights on the display ring. There is an advantage that it is easy to grasp.

  Although the various warning screen display modes have been described above, the configuration shown in FIGS. 12, 16, and 20 may be configured in parallel, or the display in FIG. 12, the display in FIG. It is good also as a structure which displays 20 displays by a time division. In the above-described embodiment, the warning based on the vision has been described mainly. However, it goes without saying that a further warning effect can be obtained by performing the warning by voice.

In addition, the first warning color, the second warning color, and the third warning color in FIGS. 14 and 18 correspond to blue, yellow, and red, respectively, in the embodiment. good. In this case, the display color determination map is a display map determination map, and as a superordinate concept thereof, other embodiments may be used as long as the map notifies the driver of the degree of warning (warning degree notification map). It goes without saying that it is possible.

  As described above, according to the warning device of the present invention, since the warning display regarding the speed limit is displayed at the timing after the speed is exceeded, the driver can easily recognize whether the speed has been exceeded. The driver's interest in is not diminished and the warning is no longer meaningful.

  Further, according to the warning device of the present invention, when a warning is displayed, a warning grace time is provided as necessary, so that a warning for an excessive speed that is not intended by the driver is avoided, and an excessive load is applied to the driver. Warning display can be performed without

  Further, according to the warning device of the present invention, when warning display is performed, it is easy for the driver to grasp a change related to the overspeed situation in order to change the display as a display method of the warning display. There are benefits.

It is a figure showing the outline of the vehicles by which the warning device concerning an embodiment of the invention is carried. It is a figure which shows the outline of the block configuration of the warning device which concerns on embodiment of this invention. It is a figure which shows the flowchart of a process and operation | movement of the warning device which concerns on embodiment of this invention. It is a figure which shows the flowchart of the speed limit information acquisition processing subroutine of the warning device which concerns on embodiment of this invention. It is a figure which shows the flowchart of the warning grace time calculation process subroutine of the warning device which concerns on embodiment of this invention. It is a figure which shows the flowchart of the driving behavior prediction process subroutine of the warning device which concerns on embodiment of this invention. It is a figure which shows the table which prescribes | regulates the relationship between a driving action classification and warning postponement time. It is a figure which shows the flowchart of the warning grace time calculation process subroutine of the warning device which concerns on other embodiment of this invention. It is a figure which shows the chart used by the warning grace time calculation process subroutine of the warning device which concerns on other embodiment. It is a figure which shows the flowchart of the warning grace time calculation process subroutine of the warning device which concerns on other embodiment of this invention. It is a figure which shows the chart used by the warning grace time calculation process subroutine of the warning device which concerns on other embodiment. It is a figure which shows the example of a screen of the warning display in the display 610 of the warning device which concerns on embodiment of this invention. It is a figure which shows the flowchart of the warning display process subroutine of the warning device which concerns on embodiment of this invention. It is a figure which shows the example of the display color determination map of speed limit 50km / h. It is a figure which shows the example of a warning display screen in the display. It is a figure which shows the example of a screen of the warning display in the display 610 of the warning device which concerns on other embodiment of this invention. It is a figure which shows the flowchart of the warning display process subroutine of the warning device which concerns on other embodiment of this invention. It is a figure which shows the example of the display color determination map of the speed limit 50km / h in the warning device which concerns on other embodiment. It is a figure which shows the example of a warning display screen in the warning device which concerns on other embodiment. It is a figure which shows the example of a screen of the warning display in the display 610 of the warning device which concerns on other embodiment of this invention. It is a figure which shows the flowchart of the warning display process subroutine of the warning device which concerns on other embodiment of this invention. It is a figure which shows the relationship table of an overspeed, penalties matter, and a display ring display color. It is a figure which shows the example of a warning display screen in the warning device which concerns on other embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Vehicle, 32 ... Steering, 54 ... Accelerator pedal, 100 ... ECU, 200 ... Travel information acquisition part, 210 ... Vehicle speed sensor, 400 ... Vehicle periphery information acquisition part , 410 ... millimeter wave radar, 420 ... camera, 500 ... driving operation part, 510 ... accelerator opening sensor, 540 ... accelerator reaction force control part, 560 ... steering vibration control part , 600 ... Interface unit, 610 ... Display, 630 ... Speaker, 800 ... Navigation system part, 810 ... Navigation system, 820 ... Navigation database

Claims (2)

A warning device that is installed in a vehicle and warns the driver that the vehicle speed exceeds the speed limit,
A vehicle speed detector for detecting a vehicle speed of the vehicle;
A speed limit information acquisition unit for acquiring information related to a speed limit of a road on which the vehicle travels;
A penalty information acquisition unit that acquires penalty information regarding a penalty from the relationship between the vehicle speed detected by the vehicle speed detection unit and the speed limit acquired by the speed limit information acquisition unit;
A display unit for displaying a difference amount corresponding to a difference between the vehicle speed detected by the vehicle speed detection unit and the speed limit acquired by the speed limit information acquisition unit, a speed limit value, and the penalty information; And a warning device. The difference amount is set larger when the excess speed calculated by the vehicle speed and the speed limit is larger than when the excess speed is small, and a predetermined warning color is determined based on the excess speed. The warning device according to claim 1.

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