JPS6076447A - Car-to-car distance display unit - Google Patents

Abstract

PURPOSE:To improve safety in car driving, by multiply indicating a reference car-to-car distance and a frontward preceding car in a display panel attached to a position, where a driver is sightable, with a three-dimensional sense. CONSTITUTION:A panel which multiply indicates a reference car-to-car distance and a position of a frontward preceding car in a relative manner is provided with a zone indicator 17 and a digital indicator 18. The display panel 19 consists in an indication giving a three-dimensional sense so as to make a driver sightable with sensation equal to a forward visual range. On the zone indicator, a horizontal line 20 showing a safe car-to-car distance and another horizontal line 21 showing a warning car-to-car distant position both are indicated and, with a signal out of an operation device, indicated after being displaced into a sightably proper position. On the digital indicator 18 at the left of these horizontal lines 20 and 21, the safe car-to-car distance and the warning car-to-car distance are indicated in a digital manner. With this constitution, an actual driving state is three-dimensionally indicated on this display panel, thus careful driving calls a driver's attention to safety.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an inter-vehicle distance display device, and more specifically, the present invention relates to an inter-vehicle distance display device, and more specifically, the present invention relates to an inter-vehicle distance display device, and more specifically, the present invention allows a driver to check the relative positional relationship between his own troops and a vehicle traveling ahead, and the degree of safety or danger thereof. The present invention relates to an inter-vehicle distance display device that displays a distance that can be visually confirmed with the same feeling as the field of view. this is,
It is used in the field of displaying the driver's relative position to the vehicle traveling ahead to ensure safe driving.

[Prior art]

As one of the inter-vehicle distance display devices, Utility Model No. 54-9794
There is one described in Publication No. 0. This system consists of a device for measuring the distance between vehicles traveling in front, a speed circuit that extracts a speed signal from the own speed needle, a distance generation circuit that extracts an appropriate distance signal from this speed circuit, and a device that measures the distance between vehicles and the appropriate distance. A comparison circuit for comparing distances and a display circuit for displaying the output of this comparison circuit are provided. According to this, when the measured inter-vehicle distance falls within the appropriate inter-vehicle distance, for example, a lamp or the like lights up to display to the driver that the current inter-vehicle distance is safe.

However, if the following distance is dangerous, it is not displayed, so it may be too late for the driver to notice the danger, and the safety level of the following distance itself is not displayed, so it is difficult for the driver to know how safe it is. I can't do it either. Therefore, such a display provides insufficient information for the driver, and there is a problem in that it is not sufficient to ensure safe driving.

[Purpose of the invention]

The present invention was made to solve the above-mentioned problems.
The purpose is to provide an inter-vehicle distance display device that provides as much information as possible about the relative positional relationship with the vehicle in front, and displays the degree of danger or safety so that the driver can visually confirm the degree of danger or safety with the same feeling as in the forward field of view. That's true.

[Structure of the invention]

The features of the inter-vehicle distance display device of the present invention are as follows.

(i) A vehicle speed detection means is provided for detecting the speed of the own army.

(ii) Inter-vehicle distance detection means for detecting the distance from the vehicle traveling ahead is provided.

(iii) receiving at least a signal from the vehicle speed detection means;
Calculating means is provided for calculating a reference inter-vehicle distance that is an index for preventing rear-end collisions.

(IV) The reference inter-vehicle distance obtained by the calculation means and the position of the preceding vehicle based on the signal from the inter-vehicle distance detection means,
Display means for relatively multiple displaying is provided.

〔Example〕

The present invention will be described below with reference to drawings of embodiments thereof.

FIG. 1 is an overall block diagram of the inter-vehicle distance display device of the present invention, in which ■ indicates an inter-vehicle distance detection means for detecting the distance to the vehicle traveling in front, 2 indicates a vehicle speed detection means for detecting the own vehicle's speed, and 3 indicates a vehicle traveling distance. road surface condition detection means for detecting the condition of the road surface;
is an outside temperature detection means. All of these employ well-known sensors, but the road surface condition detection means 3 may be one that indirectly detects, for example, non-operation, slow operation, or violent operation of a wiper that removes raindrops and snow attached to the windshield. It may also be a device that picks up a signal from a corresponding manual switch (not shown). 5 receives the signals from these detection means 1 to 4, and calculates a reference following distance, which is a cautionary following distance and a safe following distance, which are indicators for preventing rear-end collisions, and also calculates the position where the vehicle traveling ahead should be displayed. It is a means. This is the inter-vehicle distance detection means 1
A signal input via a sensor interface 6 that receives a signal from the sensor interface 6, an inter-vehicle distance measurement circuit 7 that measures the inter-vehicle distance based on the signal from the sensor interface 6, and a waveform shaping circuit 8 that shapes the signal waveform from the vehicle speed detection means 2. A vehicle speed measurement circuit 9 that measures vehicle speed by
Timing control circuit IO 1 for synchronizing calculations between and inter-vehicle distance measuring circuit 7 Road surface condition detection means 3 and outside temperature detection means 4
A calculation constant setting circuit 11 receives a signal from the circuit and sets calculation constants according to external conditions, receives signals from this setting circuit 11 and the vehicle speed measurement circuit 9, calculates a cautionary following distance and a safe following distance, A safety/caution distance calculation circuit 13 that outputs the result to the digital display driver 12;
3 and the inter-vehicle distance measuring circuit 7, calculates the relative positional relationship between the preceding vehicle and the reference inter-vehicle distance, and selects a segment at a position corresponding to the preceding vehicle on the display panel, which will be described later. , and use it as the zone display driver 14
A segment position calculation circuit 15 is provided which outputs an output to the segment position calculation circuit 15. Reference numeral 16 denotes a display means for displaying the calculated reference inter-vehicle distance and the position of the vehicle traveling ahead in a relatively multiple manner.

This has a zone display 17 and a digital display 18, each of which receives input independently from a zone display driver 14 and a digital display driver 12, and has, for example, a flat plate shape as shown in FIG. Predetermined items are displayed on the central lower half of the display panel 19. This display panel 19 is a display that provides a stereoscopic sense so that the driver can visually check the vehicle with the same feeling as the forward field of vision, and is provided with the zone display 17 and the digital display 18 described above. The zone display 17 displays a horizontal line 20 indicating a safe following distance position and a horizontal line 21 indicating a cautionary following distance position. It may be displayed in a different position. On the digital display 18 to the left of these horizontal lines 20 and 21, the safe following distance and the cautionary following distance are each displayed as digital values. In the zone display 17, a plurality of segments 22 extending in the horizontal direction are arranged in a trapezoidal shape as shown in FIG. Then, as shown in Figure 2, an appropriate number of lines (
The segments 22 (four shown) are lit or flashing.
The trapezoidal body 23, which is schematically shaped like the vehicle traveling in front, crosses the horizontal line 2.
It is displayed relative to 0.21. In addition, on the display panel 19, for example, a fuel indicator 24 indicating the remaining amount of fuel, a temperature indicator 25, an engine rotation speed indicator 26, etc. are displayed on the left and right sides so as to give a three-dimensional feeling. An alarm display 27 is arranged in which predetermined alarms issued as necessary are alternately displayed. Further, there is provided a headlight up/down indicator 28 above it, and a steering indicator 29 at the right end that displays the running direction of the vehicle and the steering angles of all wheels at that time.

According to an embodiment having such a configuration, it can be operated as follows.

When the vehicle runs, inter-vehicle distance detection means 1 shown in FIG.
The vehicle speed detection means 2, the road surface condition detection means 3, and the outside temperature detection means 4 are activated to detect the inter-vehicle distance, vehicle speed, road surface condition, and outside temperature, respectively, and the signals thereof are inputted to the calculation means 5. The inter-vehicle distance signal and the vehicle speed signal are synchronized by the timing control circuit 10, the vehicle speed is measured by the vehicle speed measurement circuit 9, and the inter-vehicle distance at that vehicle speed is determined by the inter-vehicle distance measurement circuit 7.
It is measured in On the other hand, the operating status of the wiper and the outside temperature signal, which are detected as indicators of the degree of wetness and freezing of the road surface,
The calculation constants are input to the calculation constant setting circuit 11, and calculation constants are set to determine how much safety is expected compared to a road surface in a normal state, taking into consideration the amount of tire slip corresponding to the input. Based on this calculation constant and the measured vehicle speed, safety and
The caution distance calculation circuit 13 calculates a caution distance, which is a reference distance, and a safe distance, which is obtained by multiplying this value by, for example, 1.5. These two inter-vehicle distances are output to the digital display driver 12, and thereby the display means 16
The digital display 18 in FIG. 2 displays, for example, 100M and 150M in units of 5 meters, respectively. At the same time, the calculated safe inter-vehicle distance, caution inter-vehicle distance, and measured inter-vehicle distance are input to the segment position calculation circuit 15. Then, the area where the position of the vehicle traveling ahead is in front of the horizontal line 21 indicating the cautionary inter-vehicle distance,
That is, it is determined whether the vehicle is in the danger zone 30, the area between the horizontal line 21 and the horizontal line 20 indicating the safe following distance, that is, the caution zone 31, or the safe following distance or more, that is, the safe zone 32. At the same time, the position within the zone is calculated. As a result, for example, four segments 22j to 22m corresponding to the vehicle traveling ahead are lit, and the horizontal line 2 indicating the standard inter-vehicle distance is lit.
The relative position to 0.21 is displayed in multiple ways on one display panel 19. Therefore, if the driver visually observes it, the digital value of safe following distance, caution following distance, etc.
and the relative positional relationship between them and the vehicle traveling ahead.

Note that, for example, (a) a trapezoidal body 23 that displays a vehicle traveling ahead;
is within the caution zone 31 at a position away from the horizontal line 21, the four corresponding segments light up in yellow, and (b) the horizontal line 21
When it comes into contact with , the top three lights will light up in yellow, and the bottom one will flash in yellow, and if it crosses horizontal line 21 (C), the one directly above horizontal line 21 will flash in yellow; The one on the top lights up in yellow, the horizontal line below 21 lights up in red, (d)
If the vehicle ahead is completely in the danger zone 30, all four lights will flash red, so the driver can more clearly see the level of caution or danger, further improving visibility. In particular, it is possible to ensure safe operation when it is difficult to confirm the distance between vehicles, such as at sunset, at night, or on rainy days.

By the way, in the calculation and control described above, the signals from the road surface condition detection means 3 and the outside temperature detection means 4 were also used as detection means, but they may not be provided if the calculation constants are not set. If the digital values of the safe following distance and cautionary following distance are not displayed on the display, and only the position of the vehicle in front relative to these standard following distances is displayed, the segment position calculation circuit 15 calculates the reference value. The position of the vehicle in front relative to the inter-vehicle distance may be calculated in an analog manner.In that case, it goes without saying that the digital display 18 is not employed.

〔Effect of the invention〕

As can be seen from the description of the above-described embodiments, the present invention is capable of displaying the reference inter-vehicle distance and the vehicle in front in a multiplexed manner with a three-dimensional effect on a display panel mounted at a position visible to the driver. Therefore, the driver can recognize the relative relationship between the reference inter-vehicle distance and the vehicle traveling ahead with a sense similar to the forward field of view, and can improve driving safety.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of the inter-vehicle distance display device of the present invention;
The figure is a front view showing one example of a display panel, and FIG. 3 is a schematic diagram of a group of segments arranged in a zone display for displaying the position of a vehicle traveling ahead. 1- vehicle distance detection means, 2- vehicle speed detection means, 5- calculation means, 16- display means 1

Claims (1)

[Claims] (1) A vehicle speed detection means for detecting the speed of your own vehicle; an inter-vehicle distance detection means for detecting the distance from the vehicle traveling ahead; and receiving at least a signal from the vehicle speed detection means to calculate a reference inter-vehicle distance that serves as an index for preventing rear-end collisions. a calculation means for calculating the reference inter-vehicle distance obtained by the calculation means and the position of the vehicle traveling ahead based on the signal from the inter-vehicle distance detection means;
An inter-vehicle distance display device comprising: display means for relatively multiple displaying.