JPH03182842A - Vehicle behavior display - Google Patents

Abstract

PURPOSE:To judge the behavior of a vehicle quantitatively to perform more comfortable drive by detecting the cross directional acceleration of a vehicle receiving at the time of travelling a curve with an acceleration sensor, and displaying direction and largeness thereof with a display means. CONSTITUTION:An acceleration sensor 2 for detecting the cross directional acceleration of a vehicle and of which measuring range is, for example, -0.75G-+0.75G is located, for example, in the center of a roof of the vehicle. The acceleration signal to be input from the acceleration sensor 2 is input to a judging circuit 3, and direction and largeness of the acceleration applied to that vehicle is judged to output the display signal. At this stage, each range of each measuring range -0.75G-+0.75G in right and left is blocked into 5 stages to judge largeness of the acceleration into 5 stages. The display signal output from the lugging circuit 3 is input to a display 4 arranged in a instrument panel to display direction and largeness of the acceleration on a display faceplate 4a.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a vehicle behavior display device that displays the behavior of a vehicle.

(Prior art) A vehicle is subjected to large lateral acceleration (hereinafter referred to as "lateral G") when driving around a curve, especially a sharp curve.
is not particularly displayed on a display device, etc., and is treated as something that is simply felt by the passenger. In general, when a vehicle behaves while driving, such as a sudden start, sudden stop, or sharp curve, the driver is aware of the vehicle's running condition in advance, and because he or she is holding the steering wheel, the driver is not too shocked by the behavior. Although you won't feel it, other passengers sitting in the front passenger seat or rear seat will notice these behaviors and feel uncomfortable. In particular, when driving on a road with continuous curves, the discomfort is significant, and some people may feel sick. Therefore, it is preferable for the driver to drive carefully so as not to cause such discomfort to other passengers as much as possible.

However, as described above, there are differences in how the driver and other occupants perceive the vehicle, and it is difficult to quantitatively judge the behavior of the vehicle, such as lateral acceleration when traveling on a curve.

The present invention has been made in view of the above points, and an object of the present invention is to provide a vehicle behavior display device that detects the behavior of a vehicle, particularly the lateral acceleration received when traveling on a curve, and displays the direction and magnitude thereof. With the goal.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides an acceleration sensor mounted on a vehicle to detect acceleration in the lateral direction of the vehicle, and a signal from the acceleration sensor to determine the direction of acceleration. The present invention is configured to include a discriminating means for discriminating the magnitude and outputting a corresponding display signal, and a display means for displaying the direction and magnitude of the acceleration based on the display signal.

(Operation) The acceleration sensor detects the lateral acceleration of the vehicle and outputs a corresponding acceleration signal. The determining means determines the direction in which the acceleration of the vehicle is applied, that is, the right or left direction, and the magnitude thereof based on the acceleration signal, and outputs a corresponding display signal. The display means displays the direction and magnitude of the acceleration based on this display signal. This allows the occupant to quantitatively judge the magnitude of the lateral acceleration.

(Example) An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

In FIG. 1, a vehicle behavior display device 1 includes an acceleration sensor (lateral G sensor) 2 that detects lateral acceleration of the vehicle, a discrimination circuit 3, and a display device 4. The acceleration sensor 2 is disposed, for example, at the center of the roof of the vehicle, and detects lateral acceleration (lateral G) applied to the vehicle and outputs a corresponding acceleration signal. For example, the acceleration sensor 2 is configured such that acceleration in the left direction is represented by -, acceleration in the right direction is represented by 10, the measurement range is -0.75G to +0.75G, and the output voltage is made to correspond linearly to 0 to 5V. It is configured. That is, the leftward acceleration in the range of -0.75G to 0 is set to 0 to 2.5V, and the rightward acceleration in the range of 0 to +0.75G is set to be in the range of 2.5 to 5V.

The determination circuit 3 is configured by, for example, a computer, and determines the direction and magnitude of acceleration applied to the vehicle based on the acceleration signal input from the acceleration sensor 2, and outputs a corresponding display signal. This discrimination circuit 3, for example, has a measurement range of -0.75G to 0.0 to the left and right.
Each range of +0.75G is divided into five stages, and the magnitude of acceleration is determined into five stages. For example, each acceleration in the left and right direction is 0.2G or more and less than 0.3G, or 0.3G or more and 0.4G.
Less than 0.4G or more but less than 0.5G, 0.5G or more and 0.6
The acceleration signal input from the acceleration sensor 2 is divided into five stages: less than G and 0.6G or more, and it is determined which of these stages the acceleration signal input from the acceleration sensor 2 corresponds to, and a display signal of the corresponding stage is output.

The display device 4 is disposed at a predetermined position on the instrument panel, and as shown in FIG. 2, the outline of the vehicle is drawn in the center of the screen 4a, and above it is a FRONT sign indicating the front of the vehicle. As shown in the figure, there are five display marks each indicating the magnitude of acceleration on both the left and right sides, and below each display mark on the left and right, there is a display mark indicating the magnitude of acceleration. G/LEFT to display direction, G
/RIGHT characters are arranged.

The display device 4 constantly displays the exterior shape of the vehicle and the characters FRONT, and turns off or off the left or right acceleration display mark depending on the magnitude of the acceleration signal input from the discrimination circuit 3.
~5 pieces are lit up in sequence, and when leftward acceleration is applied, the letters G/LEFT are lit up, and when rightward acceleration is added, the letters G/RIGHT are lit up.

The operation will be explained below with reference to the flowchart shown in FIG.

The discrimination circuit 3 receives the acceleration signal (lateral G) from the acceleration sensor 2.
(step l), determines whether the magnitude is greater than a predetermined value, that is, 2.5V, and determines whether the magnitude is greater than (2.5V).
>2.5V), it is determined that the acceleration is in the right (R) direction (step 2). When the discrimination circuit 3 discriminates that the acceleration is rightward acceleration, the discrimination circuit 3 lights up the letter G/RIGI (T) on the display screen 4a (FIG. 2) of the display device 4 to indicate that the vehicle is It is displayed that the applied acceleration is rightward acceleration, and it is determined whether the magnitude of the acceleration is greater than or equal to a predetermined value 61 (step 3).

When the discrimination answer in step 3 is negative (NO) (when the magnitude of acceleration is less than 0.2G), the discrimination circuit 3 returns to step 1 without displaying the magnitude of acceleration, and returns to step 1 in the affirmative (YE).
In the case of S), it is further determined whether or not the predetermined value is greater than or equal to a predetermined value of 62 (step 4). Then, if the determination answer in step 4 is negative (NO), the discrimination circuit 3 lights up one display mark on the right side of the display device 4 (step 5), and the magnitude of the acceleration is 0.2G or more. .Display a picture to indicate that the range is less than 3G.

If the determination answer in step 4 is affirmative (YES), that is, if the acceleration signal is greater than the predetermined value G2, the determination circuit 3 further determines whether the acceleration signal is greater than the predetermined value Ga (>G2) (step 6 ), and if the determination answer is negative (NO), two display marks C are lit (step 7) to display that the magnitude of the acceleration is in the range of 0.3G or more and less than 0.4G.

If the discriminant answer of step 6 is affirmative (YES), that is,
If the acceleration signal is larger than the predetermined value G3, the determination circuit 3 further determines whether or not it is larger than the predetermined value G<(>G3) (step 8), and the determination answer is negative (NO).
), three giant display marks are lit (step 9) to indicate that the magnitude of the acceleration is in the range of 0.4G or more and less than 0.5G.

If the determination answer in step 8 is affirmative (YES), that is, if the acceleration signal is greater than the predetermined value G4, the determination circuit 3 further determines whether the acceleration signal is greater than the predetermined value G6 (>G4) (step 10). ), if the discriminant answer is negative (NO), light up four display mark pupils (step 11),
It is displayed that the magnitude of the acceleration is in the range of 0.5G or more and less than 0.6G.

Further, if the determination answer in step IO is affirmative (YES), that is, if the acceleration signal is larger than the predetermined value G5, the determination circuit 3 further determines whether the acceleration signal is larger than the predetermined value G6 (>G5) ( Step 12) The discriminant answer is negative (NO)
), 5 giant display marks are lit (Step 13)
Then, it is displayed that the magnitude of the acceleration is 0.6 G or more, and an alarm is generated from the display device 4 (step 14) to call attention, and the process returns to step 1.

Further, if the determination circuit 3 determines in step 2 that the direction of acceleration is to the left, the determination circuit 3 lights up the characters G/LEFT on the display screen 4a (FIG. 2) of the display device 4 and indicates that the direction of acceleration is to the left. In addition to displaying that the acceleration is in the left (L) direction, the magnitude of the acceleration is a predetermined value 61.
It is determined whether or not this is the case (step 15). When the discrimination answer is negative (NO) (when the magnitude of acceleration is less than 0.2G), the discrimination circuit 3 returns to step 1 without displaying the magnitude of acceleration, and when the discrimination answer is affirmative (YES) In addition, it is determined whether the value is greater than or equal to a predetermined value G1 (step 16).
)do.

If the determination answer in step 16 is negative (NO), the determination circuit 3 lights up one display mark off on the left side of the display screen 4a (step 17), and if the magnitude of the acceleration is 0.
Displays that the range is 2G or more and less than 0.3G. Thereafter, in the same manner, the display marks are turned on in sequence according to the magnitude of acceleration (steps 18 to 24). Then, when the discrimination circuit 3 lights up five giant display marks (step 24) to indicate that the magnitude of acceleration is 0.6G or more, the discrimination circuit 3 generates an alarm from the display device 4 (step 14).
to get their attention, and return to step 1.

This allows the occupant to quantitatively judge the lateral acceleration applied to the vehicle.

Further, the discrimination circuit 3 is provided with a peak value hold circuit that holds the transient peak value of the lateral acceleration for a certain period of time.
As shown in the figure, after reading the acceleration signal (lateral G signal) from the acceleration sensor 2 (step 1) and determining the direction of the Tokai acceleration (step 2), whether the acceleration is larger than a predetermined value G ( G, >Gfi-1) (step 30), and if the answer is negative (NO), the screen of the display device 4 is held (step 31) and five acceleration display marks are lit (step 30). 32) and determines whether a certain period of time, for example, 5 seconds has elapsed (step 33).
)do. If the discriminant answer in step 33 is negative (NO), the process returns to step 31 and continues the display, and is affirmative (Y).
ES), return to step l. This allows the occupant to later view information that cannot be viewed during transient driving.

In this embodiment, the discrimination circuit 3 for displaying acceleration;
Although the case where the display device 4 etc. is specially provided has been explained,
For example, in the case of a vehicle equipped with an information display system that displays vehicle information, map information, etc. on a cathode ray tube, the software for the discrimination means is added to the computer of the information display system, and the acceleration sensor 2 Alternatively, the direction and magnitude of the acceleration may be determined by inputting an acceleration signal from the controller, and the magnitude of the acceleration may be graphically displayed on the cathode ray tube in the same manner as described above.

(Effects of the Invention) As explained above, according to the present invention, an acceleration sensor mounted on a vehicle detects the lateral acceleration of the vehicle, and a signal from the acceleration sensor determines the direction and magnitude of the acceleration. By providing the discriminating means that outputs a corresponding display signal and the display means that displays the direction and magnitude of the acceleration using the display signal, it becomes possible to quantitatively know the lateral acceleration applied to the vehicle. This has the excellent effect of making it possible to drive more comfortably, especially when driving on a road with continuous curves, without giving the passenger 14 degrees of acceleration. .

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the vehicle behavior display device according to the present invention, FIG. 2 is a diagram showing an embodiment of the display screen of the display device of FIG. 1, and FIG. Flowchart showing the operation of the vehicle behavior display device. FIG. 4 is a part of the flowchart showing the operation when the vehicle behavior display device of FIG. 1 is provided with a peak value hold circuit. DESCRIPTION OF SYMBOLS 1... Vehicle behavior display device, 2... Acceleration sensor (lateral G sensor), 3... Discrimination circuit, 4... Display device, 4
a...Display screen.

Claims (1)

[Claims] an acceleration sensor mounted on a vehicle to detect acceleration in the lateral direction of the vehicle; a determining means for determining the direction and magnitude of acceleration based on a signal from the acceleration sensor and outputting a corresponding display signal; A vehicle behavior display device comprising display means for displaying the direction and magnitude of acceleration.