JPH06316264A - Car speed displaying method - Google Patents

Abstract

PURPOSE:To provide a car speed displaying method that enables a running car to sight a speed restriction and a decelerating pattern existing ahead. CONSTITUTION:In a car being set up in a driver's cab, and made up of making speed information pertaining to 'car driving' indicatable on a panel-form display 1, one direction of this display 1 is set down to a speed axis, and thereby the current travel speed 3 of his own car is displayed by a pictorial pattern along this speed axis. In addition, a maximum 4 in an interval, where his own car is traveling at present, is displayed through an image picture in a part comparable to the former likewise, while in view of the present position of its own car, such one as the near future out of the maximum speed in the future is displayed large enough, and the maximum speed in the remote future is displayed to be smaller, that is to say, this car speed displaying method is one that is made so as to repeatedly display both of these maximum speed images as if they were the laws of perspective.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle speed display method for informing a driver of speed information necessary for driving a vehicle such as a railway vehicle or an automobile.

[0002]

2. Description of the Related Art In a conventional railroad vehicle, a driver judges whether or not the vehicle can be driven during driving by a signal of a three-color display system provided on the road shoulder on the ground. An ATS device is provided to do so, and if you accidentally enter the prohibited area, you can apply an interlock so that you can stop by applying an emergency brake.

Further, when it becomes impossible to keep up with the visual recognition by a signal on the ground, the vehicle is instructed to a maximum speed which is good for the current running in that section, and the maximum speed of the currently running section is indicated on the speed register of the vehicle, The ATC device that compares the maximum speed instructed by the vehicle with the current speed of the vehicle, and when the current speed of the vehicle is higher than the maximum speed, the brake automatically operates until the vehicle speed drops below the maximum speed. Has been adopted. In this case, the driver confirms the relationship between the maximum speed marked on the speedometer and the speed of the own vehicle, and considers the time to the next station, etc., and then performs acceleration / deceleration control at the driver's discretion.

The ATC device cannot predict in advance when and how much the maximum speed will be indicated on the vehicle, except for a special section such as a station, and corresponds to the suddenly displayed maximum speed. Then, the speed of the vehicle is controlled.

On the other hand, the ATS- which has recently been adopted in railway vehicles
The P device does not simply indicate the maximum speed stepwise like the ATC device, but when a signal from the ground is received, the deceleration pattern that considers the deceleration capability of various vehicles according to the instructions from the ground on the vehicle as needed. When the speed at which the deceleration pattern is set and the speed of the vehicle at that point are caught in the deceleration pattern, the brake will be applied automatically.

FIG. 7 shows an example of a method of displaying a deceleration pattern provided by a conventional ATS-P device. The vertical axis represents the vehicle speed 18, the horizontal axis represents the distance 21, and 19 is the maximum caution speed. , 20 indicates the absolute speed. This figure is a quadratic curve that connects the maximum speed to the distance that is usually drawn, and the distance and speed of the own vehicle should be plotted in this figure to see how the own vehicle approaches this deceleration pattern. Is indicated by.

[0007]

However, even if such a deceleration pattern is presented to the driver, it has nothing to do with the forward vision as seen by the driver. Presenting is limited to indicators located on or next to the cab, and thus it is difficult to constantly request confirmation from the driver.

Further, in FIG. 7, the maximum speed 20 changes depending on the position (point) of the vehicle, so that it is difficult to indicate a specific speed on the speedometer as in the ATC device, and the speed is reduced in advance. It is extremely difficult to predict how close the pattern will be or how many seconds later the deceleration pattern will be contacted and the brake applied. For this reason, when the driver is driving the vehicle, the driver suddenly gets caught in the deceleration pattern and suddenly brakes to stop.

This is especially true when the driver is unprepared for the fact that the vehicle suddenly bumps into the deceleration pattern in a situation where a vehicle running like the ATS-P system cannot predict and suddenly acts. May occur, which is very undesirable. For this reason, it is desired to develop a technique capable of predicting this and controlling the speed of the vehicle in advance.

The present invention makes it possible to visually check the speed limit and the deceleration pattern existing in front of a running vehicle, so that a driver can know important information for driving and handling as a driver. The purpose is to provide.

[0011]

In order to achieve the above object, the present invention is configured as follows. Claim 1
The invention corresponding to, in a vehicle display device installed in a driver's cab of a vehicle and displaying speed information related to driving by a display device, one direction of the display device is defined as a speed axis, and along this speed axis The current running speed of the vehicle is displayed as an image, and the maximum speed of the section where the vehicle is currently running is displayed in an area that can be compared with this. This is a vehicle speed display method in which one in the near future is displayed large, the maximum speed in the far future is displayed small, and both maximum speed images are displayed as if they were displayed by the perspective method.

A second aspect of the present invention is a method in which a head-up display is used as a display, and a speed display image is projected in the front visual field of the cab. The invention corresponding to claim 4 is such that, when the vehicle travels at the current speed as it is, at least one of the distance and the time at which the vehicle hits the speed limit or the speed limit pattern is displayed numerically. It is the method.

The invention according to claim 3 is a method of displaying the current traveling speed of the own vehicle as an image and also displaying the past speed of the own vehicle together with the image display. The invention corresponding to claim 5 is a recommendation that comes in addition to the current traveling speed of the own vehicle and the maximum speed of the own vehicle, as well as a specified speed at which the own vehicle should travel, or a point such as keeping a diamond when the own vehicle is operating. This is a method for displaying the speed at a position where it is easy to compare the speed with the speed of the own vehicle.

[0014]

According to the present invention, the following effects can be obtained.
That is, according to the invention corresponding to claim 1, by displaying the speed in the far future in a small scale and in the near future in a large scale by the perspective method, the restriction pattern that cannot be seen as a driver can be realized. Since it can be displayed with the same effect by visual inspection, it becomes possible to predict how the vehicle traveling speed should be controlled in the near future as a driver. Especially, there is an invisible speed pattern like the signal device of the ATS-P device. , It is extremely effective in preventing the vehicle from suddenly getting caught in its speed pattern.

Further, according to claim 4,
For example, the belt of the speed limit pattern is projected on the traveling path that looks forward, for example, on the track, and the speed limit pattern is a perspective method. There is a speed limit wall in front of the vehicle running, the vertical axis is displayed using speed regardless of perspective, and if the current speed of the vehicle is entered in the speed display, the vehicle will continue to run as it is. If you continue, you can immediately determine whether or not you will be caught in the speed limit pattern, and by displaying at least one of the distance and time until you get caught in the speed limit pattern in the same figure, you It is possible to easily determine whether or not to drive, and it is possible to actually see the maximum speed and deceleration pattern walls on the road, which cannot be seen by general methods.

Further, according to the second aspect, by using the head-up display as the display device, it becomes possible to know the speed limit wall at the same time while continuing to monitor the front by being given a signal on the traveling road.

According to the third aspect of the invention, since the current speed of the vehicle is also displayed, it is easy to monitor the vehicle.

Furthermore, according to the fifth aspect, since the desired speed is displayed, it is possible to drive at this speed and stop at the desired stop position.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic configuration of a vehicle to which the present invention is applied. The vehicle has a steering wheel and a chair so that a driver 7 can operate in a driver's cab, and a space between a front waist plate portion 9 and a ceiling portion 10 is provided. In addition, a head-up display D having a head-up display projector 11 and a head-up display reflector 12 is provided in the driver's cab. This head-up display D is known from Japanese Patent Application Laid-Open No. 3-117302, etc., and this allows a pilot to freely raise his head and track a target when shooting a missile or machine gun of a fighter aircraft, especially in a military aircraft. There is a device that is well known as a device. This allows the driver to recognize the signal information on the traveling path, for example, on the track by a method such as projecting this deceleration pattern in the driver's front view and visually recognizing that there is an invisible deceleration pattern in the front view. You can do it. 13 in the figure
Indicates a head-up display luminous flux.

In FIG. 1, a head-up display projector 11 displays a head-up display reflector (which is made of transparent glass) on an image shown in FIG.
It is projected so as to focus on the infinite distance in front of the driver 7 through 12, and the driver 13 can visually recognize it with the light flux 13 incorporated in the front view.

FIG. 3 shows a display screen projected by the head-up display D of FIG. 1. Specifically, the deceleration pattern is focused by the head-up display D at a position at infinity. An example of projection is shown. 1
Shows the entire graphic display screen. In this display screen 1, the vertical direction is defined as a speed axis, and the current speed 3 of the vehicle is displayed as a vector on this speed axis. Further, the maximum speed 2 of the own vehicle is displayed in the horizontal direction above the own vehicle speed 3, and the upper edge of this speed display line indicates the absolute maximum speed at the point where the own vehicle is currently running. Also, the lower edge of the speed display line shows an arbitrary maximum speed obtained by subtracting a certain speed from the maximum speed.

Further, between the maximum speed 2 of the own vehicle and the current speed 3 of the own vehicle, the maximum speed 4 at the future position is displayed vertically, and the maximum speed 4 at the future position is received from the ground. It is the maximum speed pattern applied at the future position calculated from the information. In the case of this image, the maximum speed at the position where the vehicle is currently is within a certain width such as the maximum speed of the vehicle 2. It is displayed, and the ceiling position of the maximum speed 4 of this defined width is the maximum speed in the near future, and as it goes down, the maximum speed in the distant future is shown. This is displayed as if it was displayed in perspective. It is a thing.

When the vehicle continues to run at the speed, the width of the portion where the speed vector 3 overlaps the maximum speed 4 at the future position indicates the distance between the maximum speed pattern (deceleration pattern) and the collision position. In order to make it easier to understand in a supplementary manner, the distance 5 to hit the maximum speed pattern is expressed as, for example, 500M, and the time 6 when running at the current speed is expressed as, for example, 30S (seconds). There is. It is not always necessary to display the distance 5 and the time 6 until the collision with the maximum speed pattern, but it is sufficient to use a value that allows judgment even with the width of the maximum speed 4 at the future position.

FIG. 2 shows a state in which a projected image obtained by projecting the screen of FIG. 3 by the head-up display D of FIG. 1 is read into the front view of the cab of the vehicle.
In the figure, an example of overlapping with the front screen is shown. 1 in the figure
Reference numeral 4 is a track (track), 15 is a power line pillar, 16 is a power line support truss, and 17 is a power line.

The effects of the present embodiment thus constructed will be described below. Unlike the conventional method of displaying the speed limit deceleration pattern by the distance axis and the speed axis and the designated speed, the display method of this embodiment is the future speed limitation viewed from the position of the vehicle, the deceleration pattern, the designated speed. By using the perspective method to display small things in the far future and large things in the near future, it is possible to display the restriction pattern that was not previously visible as a driver with the same effect, so it is close as a driver. It becomes possible to predict how to control the vehicle traveling speed in the future, and in particular, there is an invisible speed pattern like the signal device of the ATS-P device.
It can be very effectively dealt with to prevent inconveniences such as the vehicle suddenly being caught in the pattern.

Also, as shown in FIG. 2, for the driver,
For example, a band 4 of a pattern showing a speed limit of a certain width is projected onto a line 14 seen in front, and the pattern of the speed limit is a perspective method. Is widely expressed, there is a speed limit wall in front of the vehicle running, and the vertical axis shows the vector of speed 3 regardless of the perspective, and the speed 3
By adding the current speed of the own vehicle to the display of, it is possible to immediately determine whether or not the own vehicle continues to travel and is caught in the speed limit pattern.

Further, in FIG. 2, the distance 5 and the time 6 until the speed limit pattern is caught are displayed. Therefore, as a driver, it is possible to easily judge how to drive the vehicle in the future, You will be able to actually see the walls of the maximum speed and deceleration pattern on that line, which cannot be seen by the method.

Furthermore, since this display is combined with the head-up display D, it is possible to simultaneously know the speed-limiting wall as if given by a signal on the line 14 while continuing to monitor the front.

In FIG. 2, the driver can know the relationship between the speed of the vehicle on the currently running track and the maximum permissible speed on this track at the same time, and at the same time, in the section where the vehicle will enter in the future. When there is a deceleration pattern, the wall of the deceleration pattern that is not actually visible can be drawn in front of the eyes and visually recognized.
For this reason, it is possible to avoid sudden collisions with the deceleration pattern without notice while driving. In other words, the brakes that act when the speed exceeds the deceleration pattern are generally hard brakes, and when the brakes start to be applied, there is no control to loosen the brakes. Driving is done while thinking that the brake should not be applied as much as possible. Therefore, it is extremely important information for the driver to know the existence of the deceleration pattern in advance.

FIG. 4 shows the same contents as the display screen shown in FIG. 3 and the change in the speed of the own vehicle for a few minutes in the past, all centered on the left axis. Is shown. In the figure, 2 is the maximum speed of the vehicle, 4 is the maximum speed according to the deceleration pattern at the future position, and 3A
Shows the speed display of the own vehicle, and also shows as in 22 how the speed of the own vehicle has changed in the past.

In the case of FIG. 4, since all the information is displayed slightly to the left, it is displayed as the situation on the track that needs to be monitored most carefully in the forward view as shown in FIG. It is easy to monitor because there is little overlap with various images.

The display shown in FIG. 5 is a display slightly different from that of the ATS-P device. For example, when the vehicle is connected, the vehicle is once stopped at a certain close position and then approached again to be connected. In the example in which the vehicle speed is designated in such a case, 25 indicates a future stop point and 26 indicates an ideal approach speed pattern. Therefore, the designated speed at this position is indicated by 24,
If the speed 3A of the own vehicle is controlled so as to match the specified speed 24, the vehicle can ideally stop successfully at the stop point 25. It is used to connect the past speed history 22 of the vehicle to this deceleration designation pattern, and if it has a smooth curve, it is used to predict that the future designated speed 26 can be met at the next time. ing.

FIG. 6 is a display including a kind of navigation display in which there is no deceleration pattern in the distance on the screen of FIG. 3 and the recommended speed on the timetable is displayed at 27 and the current delay time on the timetable is shown at 28. The following is an example in which it is possible to determine whether the speed 3A of the vehicle is lower or higher than the recommended speed 27 by considering the recommended speed 27 in operation and the delay 28 with respect to the scheduled timetable.

Although the calculation displays used for the various displays described above require some devise, they are practical because they do not require any new technology. Figure 3 shows the figure when this projected image is read into the front field of view in an ideal situation. This figure was shown as an ideal figure, but this combination method shows the situation on the front track. Since it may be a hindrance in monitoring, it may be slightly shifted horizontally or vertically.

Although all of the above explanations have been made for railway cars, if a signal oscillator is installed on the road side and a receiver is installed on the car side, such as when a car travels on a highway, speed limits and accidents may occur. It can be very convenient to tell the driver how to proceed on the road ahead. This future information is effective even if it is displayed only on the graphic display screen, but if the head-up display device is used to display a speed pattern that is not actually visible in the front view as a visible image, the effect is more effective. It is possible to increase the sex.

[0036]

According to the speed display method of the present invention, the future speed limit, the deceleration pattern, and the designated speed as viewed from the position of the vehicle are displayed by the perspective method in a small size in the far future and in a large size in the near future. By doing so, it is possible to predict how the vehicle traveling speed should be controlled in the near future as a driver, because the restriction pattern that could not be seen as a driver in the past can be displayed with the same effect when actually viewed. -There is an invisible speed pattern like a P-type signal device, and it is possible to prevent the inconvenience that the vehicle suddenly gets caught in the pattern.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of a vehicle to which the present invention is applied.

FIG. 2 is a front view diagram when a display image obtained by a head-up display according to the method of the present invention is projected in the front view of a driver.

FIG. 3 is a diagram showing a first example of a display image on a graphic display according to the method of the present invention.

FIG. 4 is a diagram showing a second example of a display image on a graphic display according to the method of the present invention.

FIG. 5 is a diagram showing a third example of a display image on a graphic display according to the method of the present invention.

FIG. 6 is a diagram showing a fourth example of a display image on a graphic display according to the method of the present invention.

FIG. 7 is a view showing a display method of a deceleration pattern diagram which is generally used conventionally.

[Explanation of symbols]

1 ... Graphic display screen, 2 ... Maximum speed of the vehicle, 3 ...
Vehicle speed, 4 ... Maximum speed at future position, 5 ... Distance to speed limit, 6 ... Time until speed limit, 7 ... Driver, 8 ... Front glass, 9 ... Front waist plate, 10 ... Ceiling part , 11 ... Head-up display projector, 12 ... Head-up display reflector, 13 ... Head-up display luminous flux, 14 ... Track, 15 ... Train line support, 16 ... Train line support truss, 17 ... Train line, 18 ... Own vehicle Speed, 19 ... Attention maximum speed, 20 ... Absolute maximum speed, 21 ... Distance axis, 22 ... Past speed progress of own vehicle, 23 ... Speed axis, 24 ... Specified speed at present time, 25 ... Future stop point, 26 … Specified future speed, 27… Recommended speed for operation, 28… Time delay with scheduled timetable.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Asahi Nakano 2-13-13 Mita, Meguro-ku, Tokyo

Claims (5)

[Claims] 1. A display device for a vehicle, which is installed in a driver's cab of a vehicle and displays speed information related to driving on a display device, wherein one direction of the display device is defined as a speed axis, and a self-direction is set along the speed axis. The current speed of the vehicle is displayed as an image, and the maximum speed of the section where the vehicle is currently traveling is displayed as an image in a part that can be compared with this. Vehicle speed display method characterized by displaying the near future in a large size, displaying the maximum speed in the distant future small, and displaying the maximum speed images of both as if they were displayed in perspective. . 2. The vehicle speed display method according to claim 1, wherein a head-up display is used as the display, and a speed display image is projected in the front view of the driver's cab. 3. The vehicle speed according to claim 1, wherein in addition to displaying the current traveling speed of the own vehicle as an image, the past speed of the own vehicle is also displayed together with the image display. Display method. 4. When the vehicle travels at the current speed, at least one of the distance and the time at which the vehicle hits the speed limit or the speed limit pattern is displayed numerically. The vehicle speed display method according to claim 1. 5. In addition to the current traveling speed of the own vehicle and the maximum speed of the own vehicle, a specified speed at which the own vehicle should travel, or a recommended speed that comes from the point of keeping a timetable for the own vehicle to operate is the own vehicle. 2. The vehicle speed display method according to claim 1, wherein the speed is displayed at a position where it is easy to compare in relation to the speed.