JPH02106473A - Attitude display device for four-wheel steering vehicle - Google Patents

Abstract

PURPOSE:To prevent the contact trouble with an obstacle before hand by arranging distance sensors for detecting the distance from the obstacle in the longitudinal intermediate part and the rear edge part of the both side walls of a vehicle and flashing a lamp on a display panel arranged in a driver's room when the detection distance is less then a prescribed value. CONSTITUTION:Distance sensors 4 and 5 are installed at the longitudinal intermediate part and the rear edge part of the left side wall 3 of a vehicle 1, and distance sensors 6 and 7 are installed at the longitudinal intermediate part and the rear edge part of the right side wall 3a of the vehicle 1, and the detection signals are inputted into an electronic controller 2. Further, a display board 10 for allowing a driver to confirm the vehicle attitude by a lamp is provided on a driver's set, and said display board is equipped with lamps 4a-7a corresponding to the distance sensors 4-7. The lamps 4a-7a which correspond to the case where the detection distance by the distance sensors 4-7 is lees than a prescribed value are flashed, and the degree of flashing is increased more as the distance between the side wall of the vehicle and an obstacle is less, and when the distance is less than a set value, lighting is continued, and an alarm is operated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an attitude display device for a four-wheel steering vehicle.

[Prior Art] In a four-wheel steering vehicle, when the rear wheels are steered in the opposite phase to the front wheels when driving at low speeds, the vehicle's turning ability is improved, making it easier to change directions on narrow roads. However, since the vehicle attitude of a four-wheel steered vehicle changes significantly compared to a two-wheel steered vehicle, an inexperienced driver may not be able to accurately judge the relative position of the vehicle to an obstacle.

As with the four-wheel steering vehicle disclosed in Japanese Patent Application Laid-Open No. 59-26368, it is not possible to accurately determine the vehicle attitude with respect to an obstacle by simply displaying with a lamp whether the rear wheel steering angle is in phase with or in phase with the front wheels. . Even with the four-wheel steering vehicle disclosed in Japanese Patent Application Laid-open No. 60-85076, although the steering angle ratio of the rear wheels to the front wheels is displayed on a graph, the relative position with respect to obstacles cannot be accurately determined, making it difficult to prevent accidents. It cannot be said that it is perfect.

[Problems to be Solved by the Invention] In view of the above-mentioned problems, an object of the present invention is to provide a four-wheel steering system that accurately determines the vehicle posture with respect to obstacles around the rear of a vehicle with poor visibility, and that is useful for preventing collision accidents. An object of the present invention is to provide a vehicle attitude display device.

Means for Solving Problem E] In order to achieve the above object, the configuration of the present invention is such that distance sensors for detecting the distance to an obstacle are disposed at the front and rear middle portions and rear end portions of both side walls of the vehicle. However, when the detected distance of the distance sensor is less than a predetermined value, a lamp on a display panel provided in the driver's cab corresponding to each distance sensor is blinked.

[Function 1] When each part of the vehicle approaches an obstacle, the four distance sensors 4 to 7 disposed at the middle and rear ends of both side walls of the vehicle operate according to the respective distance sensors 4 to 7. Display board 1 placed in the sky
0 lamps 4a to 7a are blinked. If the front and rear lights on one side wall are blinking, it is determined that the vehicle is approaching the obstacle in a substantially parallel manner. Furthermore, if the lamp at the rear end of one side wall is flashing, it is determined that the vehicle is tilted with respect to the obstacle. In this way, changes in the vehicle's attitude relative to obstacles are detected moment by moment, so by correcting the rear wheel steering angle, it is possible to safely change direction on a narrow road.

[Embodiments of the Invention] FIG. 1 is a plan view of a four-wheel steering vehicle equipped with an attitude display device according to the present invention. Left side I of vehicle 1! ! Distance sensors 4.5 are disposed at the front and rear intermediate portions and rear end portions of 3, respectively. Distance sensors 6.7 are disposed at the front and rear intermediate portions of the right side wall 3a of the vehicle 1 and at the rear a11 portion.

The distance sensors 4 to 7 are equipped with an oscillator and a receiver for e.g. ultrasonic waves, and receive ultrasonic waves reflected by an obstacle such as a wall on one side of the road to detect the distance between the side wall of the vehicle and the obstacle. Detect distance. The electrical signals detected by each sensor 4 to 7 are applied to the electronic control device 2 as an input signal. When driving on roads where there is no risk of collision with obstacles,
In order to stop the operation of the display panel 10, the electronic control device 2 is configured to issue an output signal only when the gear shift lever 9 of the gear transmission 8 is in reverse gear, first gear, or second gear. .

Display a10 for the driver to visually check the vehicle attitude using a lamp
is provided in the driver's seat. It consists of a rectangular display panel similar to the display panels 10G and 11 cars, and lamps 48 to 7a corresponding to the distance sensors 4 to 7 are arranged at the upper and lower intermediate portions and the lower end of both side edges. Although the lamps 4a to 7a may have a round shape, it is preferable that the light emitting surface is triangular as shown in the figure. Further, in order to draw the driver's attention, if the distance detected by the distance sensors 4 to 7 is smaller than a predetermined value, it is preferable that the corresponding lamps 48 to 7a blink, as shown in FIG. The shorter the distance between the side wall of the vehicle and the obstacle, the higher the blinking intensity, and when the distance is roughly smaller than the SO (for example, 5cm), the lamp lights up continuously.
The alarm is configured to sound.

According to the above configuration, as shown in FIG. 3, when the vehicle 1 approaches an obstacle 12 such as a wall on the right side of the road, the distance sensor 6.7 detects the approaching distance, and the display panel shown in FIG. 10 lamps 6a and 7a are blinked. Thereby, the driver can visually recognize that the vehicle 1 is approaching the obstacle 12 in a substantially parallel manner and is in a dangerous situation.

Further, as shown in FIG. 4, when the vehicle 1 turns right on a narrow road, when the left rear end of the vehicle 1 approaches an obstacle 13, it is detected by the distance sensor 5, and the lamp 5a of the display panel 10 lights up. Flashes. Thereby, the driver can prevent the rear end of the vehicle 1 from coming into contact with the obstacle 13 by correcting the steering angle of the rear wheels to a small value.

As shown in FIG. 5, when the vehicle 1 turns right, when the right side wall 3a of the vehicle 1 approaches the obstacle 14 at the right corner,
This situation is detected by the distance sensor 6, and the lamp 6a on the display panel 10 flashes, so that the driver determines whether to move the vehicle 1 forward or backward.

As mentioned above, when turning right on a narrow road, turn to the right 13a.
Distance sensor 6.7 and the left side! The posture of the vehicle 1 is accurately determined by the distance sensor 5 of No. 3, and the steering wheel 11 is returned.
- By first moving backward and then moving forward while correcting the turning angle of the steering wheel 11, it is possible to safely pass corners that are difficult to pass with a two-wheel steering vehicle.

FIG. 6 shows the display panel 10 based on the signals from the distance sensors 4 to 7.
2 is a flowchart of a control program for an electronic control II display device comprising a microcomputer that blinks the lamps 4a to 7a of FIG. In the figure, p11 to p18 indicate each step of the flowchart. This control program is repeatedly executed at predetermined time intervals.

Start with pH, initialize the operation part with p12, and p1
At step 3, it is determined whether the shift position of the gear change lever 9 is in the first gear, second gear, or reverse gear. If the shift lever 9 is not in the first gear, second gear, or reverse gear, the process returns to p12. When the shift lever 9 is in the first gear, second gear, or reverse gear, it is determined in p13 whether the engine speed is O or not. If the engine speed is O, the process returns to p12, and if the engine speed is not O, the distance S to the obstacle detected by each of the distance sensors 4 to 7 is read in p15. At p16, it is determined whether the distance S detected by each of the distance sensors 4 to 7 is smaller than a predetermined value @a. If the distance S detected by the distance sensors 4 to 7 is larger than the predetermined value a, p17
Return to The distance S detected by the distance sensors 4 to 7 is
If it is smaller than the predetermined value a, each distance sensor 4 is
The lamps 4a to 7a on the display panel 10 corresponding to 7 are blinked, and an alarm is sounded if necessary. At p18, the lamps 4a to 7a on the display panel 10 are turned off after a predetermined period of time has elapsed.

[Effects of the Invention] As described above, in the present invention, distance sensors for detecting the distance from an obstacle are disposed at the front and rear intermediate portions and rear end portions of both side walls of the vehicle, and the distance sensors detect a predetermined distance. When the distance is below the value, the lamps on the display panel installed in the driver's cab will flash corresponding to each distance sensor, so the vehicle's III! ! The approaching state of the vehicle to an obstacle is detected by four distance sensors, and the lamp on the display panel that corresponds to the location of the distance sensor flashes, allowing the driver to accurately judge the vehicle's attitude toward the obstacle from the display panel. It is possible. Accidents of contact with obstacles can be prevented.

In particular, by disposing the distance sensor at the front and rear intermediate portions of the vehicle, it is determined whether the vehicle can move forward without coming into contact with obstacles during a change in direction of the vehicle. Furthermore, by disposing the distance sensor at the rear end of the vehicle, the relationship between the rear end of the vehicle and obstacles that cannot be clearly seen from the driver's seat can be accurately determined.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a four-wheel steering vehicle showing the configuration of the attitude display device according to the present invention, FIG. 2 is a diagram showing the relationship between the distance detected by the distance sensor and the blinking degree of the lamp on the display panel, and FIG. ~5
FIG. 6 is a plan view showing the relationship between the vehicle and obstacles, and FIG. 6 is a flowchart of a control program of an electronic control unit that controls blinking of a lamp on a display panel based on a detection signal from a distance sensor. 2: Electronic control device 4-7: Distance sensor 4a-7a:
Lamp 9: Gear shift lever 10: Display panel patent applicant
Isuma Automobile Co., Ltd.

Claims (1)

[Claims] Distance sensors that detect the distance to obstacles are installed at the front, middle, and rear ends of both side walls of the vehicle, and when the detected distance of the distance sensor is less than a predetermined value, the driver's cab An attitude display device for a four-wheel steering vehicle, characterized by blinking a lamp on a display panel disposed in the vehicle.