JPS6319377B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rear warning system for a running vehicle that detects an obstacle when a running vehicle such as an automobile is backing up and provides a warning and information regarding the obstacle to the driver.

Generally, as shown in Figure 1, for example, two ultrasonic transmitters TX1, TX2 and one ultrasonic receiver RX are attached to the rear of the vehicle body, and the transmitted ultrasonic waves are transmitted by sequentially switching the channels of the combination of transmitting and receiving. The presence or absence of an obstacle is detected based on whether or not the sound wave is reflected by and received by the obstacle O1 or O2, and when the obstacle O1 or O2 is detected, a warning is given to the driver and an ultrasonic wave is transmitted. The distance to the obstacle O1 or O2 is measured based on the time from when it is received until it is received.
Or determine the direction of O2 (in the case of the figure, when the rear of the vehicle is divided into two regions, left and right), there is an obstacle O1.
A rear warning system for a running vehicle has been developed that displays the determined distance and direction on a display device to provide information about obstacles to the driver.

The present invention provides a method for displaying information on a display device, such as the distance and direction of a detected obstacle, in an optimal manner according to the driving operation of a traveling vehicle. This system provides a rear warning system for vehicles that are equipped with the following technology.

As shown in FIG. 2, the basic configuration of the rear warning system for a running vehicle according to the present invention is as shown in FIG.
1, TX2 and ultrasonic receivers RX1, RX2,
A gear shift position sensor S1 detects whether the vehicle's gear shift position is in the back while sequentially switching channels based on each combination of transmission and reception, and a brake sensor detects whether the vehicle's brakes are applied. S2 and vehicle speed sensor S2, which detects whether the vehicle speed is below a certain level (for example, 20 km/h or below), determines whether there is an obstacle behind the vehicle or not based on the reception status of each receiver RX1 and RX2. A signal processing unit (CPU) 1 that detects and determines the distance and direction of the detected obstacle, as well as centrally controls the entire system; an alarm display device 2 that displays the distance and direction of the system; and an operating device 3 that turns on the main power 4 to the system, gives appropriate display commands to the signal processing device 1, and displays the status of the system.
It is composed of: In addition, in this embodiment, two ultrasonic transmitters TX1, TX2 and 2 are used.
Two ultrasonic receivers RX1 and RX2 (each amplifies the received wave to stabilize the received signal and remove noise,
As shown in Figure 3, each obstacle O1, O2, and O3 in the area divided into three areas behind the vehicle can be detected by appropriately combining the sensors (which have a detection function). .
Moreover, the alarm display device 2 is provided with a buzzer, a display, and their drivers inside, and as shown in FIG. Distance to object in 0.1m increments of 2 significant figures
It consists of a distance display section N that is digitally displayed with digits, and an operation display section W that lights up when the system is activated. The obstacle detection capability of this system is set to be able to detect obstacles within a range of, for example, 2.0 m behind the vehicle and 1.6 m in the left and right directions. In addition, this alarm display device 2
is installed at the rear of the vehicle interior and at a position where the driver can see the display surface without obstructing the driver's rear field of view when backing up. In addition, as shown in Fig. 5, the operating device 3 is used to push the main power switch M/SW, display switch D/SW, and alarm lamps L1, D/SW, which are lit when an obstacle is detected. It consists of a lamp L2 that is turned on when the system malfunctions, and a lamp L3 that flashes when there is a system error (drivers for various lamps are built in).The lamp is mounted on the instrument panel in the driver's seat and the driver operates the switch. and system status confirmation. Further, the gear shift position sensor S1 and the brake sensor S2 may not be specially provided, and may be configured to provide a back clamp lighting signal and a brake lamp lighting signal in the vehicle to the signal processing device.

In the rear warning system for a running vehicle configured as described above, the main power switch M/SW of the operating device 3
When is pressed, the main power 4 is turned on to the system, and the vehicle is put into reverse gear, the signal processing device 1 reads the reverse signal sent from the gear shift position sensor S1 and puts the system into operation. , the presence or absence of an obstacle is detected, and when it is detected, the direction indicator lamps D1, D2, and D3 in the warning display device 2 are all turned on at the same time, and the buzzer is sounded for a short period of time (about 0.8 seconds). A warning is given to the driver, and when the driver presses the display switch D/SW of the operating device 3 in response, the distance and direction of the detected obstacle are displayed.

In this case, particularly in the present invention, when the display switch D/SW of the operating device 3 is pressed and a command to display information regarding the detected obstacle is given to the signal processing device 1, the backlash from the gear shift position sensor S1 is Depending on the signal and the brake signal from the brake sensor S2, the signal processing device 1 detects that the gear of the vehicle is in reverse and that the brake is applied, or the gear of the vehicle is shifted to a position other than back. On the condition that the obstacle is detected, a means is taken to cause the warning display device 2 to display the distance and direction of the obstacle. By taking such measures, when the driver presses the display switch D/SW of the operating device 3, information regarding the detected obstacle will be displayed unless the driver operates the brakes or gears of the vehicle. I'm making it so you can't see it.

Note that the display of information regarding detected obstacles is executed without the condition that the vehicle is stopped or running forward; When this happens, the signal processing device 1 forcibly puts the system into a display inhibited state in accordance with the output of the vehicle speed sensor S3 at that time. Also, when displaying information regarding a detected obstacle, the signal processing device 1
determines the direction of the obstacle behind the vehicle according to the detection state of the obstacle by the ultrasonic receiver RX1 or RX2, and turns on each direction indicator lamp D1, D2, D3 in the warning display device 2 according to the result. In addition to turning on the lights as appropriate, the distance to the nearest obstacle is calculated based on the time it takes for the ultrasonic wave to be reflected from the nearest obstacle and received, and the distance display section of the alarm display device 2 is displayed. The distance will be displayed digitally in units of 0.1m. In addition, the display switch D on the operating device 3
If SW is pressed again, the display mode in the signal processing device 1 will be canceled.

As described above, in the rear warning system for a running vehicle according to the present invention, when the display switch D/SW in the operating device 3 is pressed and a display command is issued to the signal processing device 1 when the vehicle is backing up, the signal processing device After confirming that the vehicle is not driving backwards, the system displays information about obstacles on the warning display, allowing the driver to perform optimal rearward warning according to the vehicle's driving operations. It has excellent advantages.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing a combination of ultrasonic transmitter and receiver when each obstacle can be detected in an area divided into two areas at the rear of the vehicle, and Fig. 2 is a rear view warning of a running vehicle according to the present invention. A block configuration diagram showing one embodiment of the system, Figure 3 shows the rear of the vehicle.
A diagram showing the combination of ultrasonic transmitter and receiver when detecting each obstacle when divided, FIG. 4 is a diagram showing an example of the configuration of the display surface in the alarm display device of the same embodiment, and FIG. 5 is a diagram showing the configuration of the display surface in the alarm display device of the same embodiment FIG. 3 is a diagram illustrating a configuration example of an example operating device. 1...Signal processing device, 2...Alarm display device, 3
...Operation device, 4...Main power supply, TX1, TX2...
...Ultrasonic transmitter, RX1, RX2...Ultrasonic receiver, O1-O3...Obstacle, D1-D3...Direction indicator lamp, N...Distance display section, W...Operation display section, M/SW ...Main power switch, D/SW...
Display switch.

Claims (1)

[Claims] 1. An ultrasonic transmitter and receiver installed to be able to detect obstacles behind the vehicle, detect obstacles and determine information about the obstacles according to the received signals of the receiver, and It has a signal processing device that controls the entire system, an alarm display device that issues an alarm when an obstacle is detected and displays the information, and an operating device that gives the signal processing device a command to display the information. However, when the signal processing device receives the display command, it is detected that the vehicle is in reverse gear and the brake is applied, or the vehicle is in a gear other than reverse. A rear warning system for a running vehicle, which takes means for displaying the information on the warning display device on the condition that the information is detected.