JPS59114139A - Rear view monitor device for vehicle - Google Patents

Abstract

PURPOSE:To provide a driver with a real feeling of distance to ensure safety in the driver's operation of backing up by electrically indicating several sets of markers in an overlapping manner on a TV monitor screen, and changing the position of markers suitably in response to the existing situation. CONSTITUTION:When there is an obstacle 11 in the rear of a vehicle, a distance sensor 6 measures the distance from the vehicle to the obstacle 11, and sends the data to CPU8 of a marker signal generating circuit 7. The CPU8 compares the data with indicated data memorized by ROM9. The indicated data responsive to the ROM9 are outputted to a monitor TV 2 through an interface 10. The obstacle 11 in the rear is shown on a screen 3 of the TV, and a marker 4 is also overlapped on it. When the obstacle comes closer by reversing the vehicle, a marker 4 remote from the obstacle 11 out of the marker 4 is erased. Therefore, the distance to the obstacle 11 can be recognized accurately.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rear view monitoring device for a vehicle.

Fastback style sports cars, large buses,
In trailers, etc., it is difficult to ensure sufficient rearward visibility with room mirrors, rearview mirrors, etc., and to compensate for this drawback, a CTV camera 1 and a monitor television 2 are combined as shown in Figure 1 for rearward monitoring. systems have been proposed in the past. However, in conventional systems of this type, the rear of the vehicle is simply displayed on the driver's seat monitor TV 2, making it difficult for the driver to get a sense of distance, making mistakes in visual estimation, and colliding with obstacles or pedestrians when backing up. or
Many collisions occurred.

Therefore, it has been proposed to install several sets of distance markers 4 corresponding to the inside of the car on the screen 3 of the monitor TV 2 in the driver's seat, as shown in Fig. 2 (a) and (b). is nothing more than printing dots on a transparent panel 5 and pasting them on the screen 3 of the monitor television 2.
The displayed content and this marker 4 are completely unrelated, and the marker 4 is displayed fixedly at a predetermined position on the screen even when a large obstacle is displayed on the screen or when the vehicle is moving backward while cutting a curve. Therefore, it was not possible to immediately determine the distance or backward direction using this marker 4, and it could even create an illusion, so it could not function as an indicator sufficiently.

The present invention has been proposed in view of the above-mentioned drawbacks, and it is possible to electrically superimpose a fine marker 4 on the screen of a monitor television, and to change the display position arbitrarily as necessary, thereby preventing obstacles. It is possible to appropriately change the marker 4 according to the presence or absence of objects, pedestrians, etc., their position, the direction of travel of the vehicle, the speed, etc., giving the driver an accurate sense of distance, and accurately informing the driver of the situation behind the vehicle. The purpose of the present invention is to provide a vehicle rear view monitoring device that can perform the following tasks.

Hereinafter, the configuration will be explained based on the embodiment of the present invention shown in the drawings.

FIG. 3 is a block diagram of an embodiment of the present invention. As is clear from the block diagram, this embodiment consists of a CTV camera 1 that monitors the rear of the vehicle, a monitor TV 2 placed in the driver's seat, It may be composed of a sensor 6 that detects the distance to an obstacle, vehicle speed, backward direction, etc., and a marker signal generation circuit 7 that inputs the signal from the sensor 6 and generates a necessary marker signal. This marker signal generation circuit 7 is operated by a CPU (center).
alprocessing unit) 8. R.O.
It is composed of an M (read o7nly memory) 9 and an interface 10.

Various types of sensors 6 can be selected depending on the display mode of the marker, including a distance sensor that measures the distance between the vehicle and rear obstacles, a tire direction sensor that measures the backward direction, and a sensor that measures the vehicle speed. Speed sensors and the like can be considered and can be arbitrarily selected as needed. However, in this case, it goes without saying that the ROM 9 must store data corresponding to the functions of the various sensors.

The configuration of this invention is as described above, and the sensor 6
The operation when using a distance sensor will be explained below. If there is an obstacle 11 behind the vehicle as shown in FIG. 4, the distance sensor measures the distance from the vehicle to the rear obstacle, and the distance data is sent to the marker signal generation circuit 7.
The display data is input to the CPU 8 of the computer and compared with the display data stored in the ROM 9, and the display data called from the ROM 9 is sent to the monitor television 2 via the interface 10.
The rear obstacle 11 is displayed on the screen of the monitor television 3 as shown in FIG. 5, and a marker 4 is placed on it.
is displayed superimposed. In other words, for example, 1711 in ROM9
If display data is accumulated such that one marker is displayed for each
If the distance to 1 is measured as 2'm, then 1 is from ROM9.
Display data for displaying two markers every m is called, and two sets of markers are displayed on the screen of the monitor television 2.

Note that the superimposed display of markers on the screen of the monitor TV 2 is as follows: (11) When an obstacle approaches, markers at a farther distance are erased. (2) When an obstacle approaches a preset distance, the vehicle (3) When an obstacle approaches a preset distance, the color of the marker can be changed, etc., and these changes are stored in ROM 9. It is clear that this can be done freely by storing the display data.In the example shown in FIG. 5, the display mode (1) is adopted.

In this way, when a distance sensor is used as the sensor 6, the marker is changed appropriately according to the position of the obstacle,
It gives the driver an accurate sense of rearward distance, warns the driver of abnormally approaching obstacles, shows the exact distance to the obstacle, and prevents the driver from colliding with an obstacle due to an incorrect sense of distance, unlike conventional models. The vehicle can be safely driven backwards without the risk of running over children playing at the rear of the vehicle. have an effect.

On the other hand, if a tire direction sensor that detects the tire steering angle is used as a sensor and a marker is used to display the expected trajectory when reversing, the vehicle's backward movement corresponding to the tire steering angle data regarding the vehicle's backward movement direction is used. Marker position data along the direction is stored in ROM 9,
When the steering angle data from the tire direction sensor is input, marker position data corresponding to the steering angle data may be read from the ROM 9. The retrieved marker position data is then sent to the monitor television 2 via the interface 10 and displayed in a superimposed manner as a row of markers 3 on the screen. In other words, in this case, marker 4 is the 6th
As shown in Figures (a)', (b)', and (e),
The display is deflected along the predicted backward trajectory of the vehicle, clearly indicating the direction in which the vehicle is traveling backwards. Furthermore, if a speed sensor that measures the vehicle speed is also used as a sensor, the markers will change depending on the speed not only when driving backward but also when driving forward. For example, when the car is traveling 10KflI/h, the marker interval will be set every f 2rn, and the vehicle speed will be 1100K/h. 5 when driving
It is also possible to set it every 0ffl. Instead of using the firefly sensor as in the above embodiment, multiple sensors such as a distance sensor and a tire direction sensor may be used in combination. Depending on the capacity of the ROM and CPU, various sensors may be used to monitor the monitor TV screen. It is possible to change the above marker in more multifaceted ways.

As mentioned above, this invention allows the driver to freely change the display position and display direction of the marker on the monitor TV screen based on the information obtained from the sensor, allowing the driver to not only secure rearward visibility but also to This has the excellent effect of accurately knowing the distance to obstacles, the backward direction, etc., and allowing safe and reliable backward movement.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of a vehicle rear view monitoring device using a conventional television camera and a monitor TV, Fig. 2(a) is a perspective view of a monitor TV using a conventional marker;
Figure (b) is a front view of the same, Figure 3 is a block diagram of an embodiment of the present invention, Figure 4 is a perspective view of the vehicle in a backward state, and Figure 5 is an image of the monitor TV when the vehicle is traveling backwards. Explanatory diagrams, FIGS. 6(a), 6(b), and 6(C) are explanatory diagrams of images on a monitor television when a tire direction sensor is used as a sensor. 1... CTV camera, 2... Monitor TV, 3.
...Screen, 4...Distance marker, 5...ノ(nel,
6...Sensor, 7...Marker signal generation circuit, 8
...CPU, 9...ROM, 10...Interface, 11...Obstacle Patent applicant Niles Parts Co., Ltd. 1 Figure 1 (a) Figure 3

Claims (3)

[Claims] (1) A television camera 1 that monitors the rear of the vehicle,
A monitor television 2 installed at the driver's seat displays images captured by the television camera 1, a sensor 6 detects the distance between the vehicle and rear obstacles, tire steering angle, etc., and signals from the sensor 6 are input. , a marker signal generation circuit 7 that generates a marker signal, outputs it to the monitor television, and displays the marker electrically in a superimposed manner on the television screen. (2) The rear view monitoring device for a vehicle according to claim 1, characterized in that a distance sensor for measuring the distance between the vehicle and a rear obstacle is used as the sensor. (3) The rear view monitoring device for a vehicle according to claim 1, wherein a tire direction sensor that detects a steering angle of a tire is used as a sensor.