JPH0143661Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a rear warning device 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.

Prior Art In general, as shown in Fig. 1, for example, two ultrasonic transmitters TX1, TX2 and one ultrasonic receiver RX are attached to the rear of a vehicle body, and the transmission and reception channels are sequentially switched. The presence or absence of an obstacle is detected based on whether or not the ultrasonic wave reflected by the obstacle 01 or 02 is received. When an obstacle 01 or 02 is detected, a warning is given to the driver and the ultrasonic wave is The distance to obstacle 01 or 02 is measured based on the time from when it is transmitted until it is received, and the distance to obstacle 01 or 02 is measured based on the transmission status of transmitters TX1 and TX2.
Or, determine the direction of 02 (in the case of the figure, when the rear of the vehicle is divided into two regions, left and right, the obstacle 01
A rear warning device for a running vehicle has been developed that displays the determined distance and direction on a display device to provide the driver with information regarding the obstacle.

Conventionally, rear warning devices for this type of vehicle have
When checking whether the rear warning function is working properly, with the vehicle stopped,
A simulated obstacle is placed at the rear of the vehicle, and the driver checks the operating status while checking the warning display inside the vehicle each time, changing the installation position as appropriate, which makes the inspection work complicated. It's summery.

Purpose This invention was made taking the above points into consideration.
As in the past, a simulated obstacle was placed behind the vehicle,
Instead of the driver having to check the operating status of the rear warning system inside the vehicle each time while changing the installation position, the driver can check the operating status of the rear warning system while detecting himself as an obstacle outside the vehicle. The present invention provides a rear warning device for a running vehicle.

Configuration In order to achieve the purpose of the present invention, in particular, the display contents of the obstacle direction display section on the display device can be seen from the rear of the vehicle, so that the user can stand at the rear of the vehicle at the time of starting inspection, etc. is detected as an obstacle, and the operating status of the rear warning device can be checked while checking the contents of the direction display.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The basic configuration of the rear warning device for a running vehicle according to the present invention is as shown in FIG.
2 and ultrasonic receivers RX1 and RX2, a gear shift position sensor S1 that detects whether the gear shift position of the vehicle is in the back while sequentially switching channels by the combination of each transmission and reception, and a brake of the vehicle. The receivers RX1 and RX2 respond to sensor signals from the brake sensor S2, which detects whether the brake is applied, and the vehicle speed sensor S3, which detects whether the vehicle speed is below a certain level (for example, 20 km/h or below). A signal processing unit (CPU) 1 that detects the presence or absence of an obstacle behind the vehicle and calculates the distance and direction of the detected obstacle based on the reception state, and centrally controls the entire rear warning device; Under the control of the signal processing device 1, an alarm display device 2 that issues an alarm when an obstacle is detected and displays the distance to the obstacle and its direction, and a rear warning device that turns on the main power 4 and outputs a signal. The control device 3 is configured to appropriately give display commands to the processing device 1 and to display the status of the rear warning device under the control of the signal processing device 1. In addition, in this embodiment, two ultrasonic transmitters TX1 and TX
2 and two ultrasonic receivers RX1 and RX2 (both have the function of amplifying and detecting the received wave to stabilize the received signal and remove noise), as shown in Figure 3. , each obstacle 01, 0 in the area dividing the rear of the vehicle into three
2 and 03 can be detected respectively. Further, the alarm display device 2 is provided with a buzzer, a display, and their drivers inside, and the display surface is a fourth
As shown in the figure, a direction indicator lamp consisting of D1, D2, and D3, and a distance display section N that digitally displays the distance to an obstacle in units of 0.1 m with two significant figures.
and the operation display section W that lights up at the operating point of the system.
It is made up of. The ability of this rear warning device to detect obstacles is, for example, 0.2m behind the vehicle.
It is set to be able to detect obstacles within a range of 1.6m in the left and right directions. FIG. 5 shows the external appearance of the warning display device 2, which is installed in the rear part of the vehicle interior 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. 6, the operating device 3 includes push button switches such as main power switches M and SW and display switches D and SW, and alarm lamps L1 and D that are lit when an obstacle is detected.
It consists of a lamp L2 that lights up when the SW is pressed, and a lamp L3 that flashes when there is an abnormality in the rear warning system (drivers for various lamps are built in), and it is attached to the instrument panel part of the driver's seat. This allows the driver to operate switches and check the status of the system. 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.

FIG. 7 shows an example of a state in which each component of the rear warning device for a traveling vehicle according to the present invention is installed in an automobile. In the figure, S is ultrasonic transmitter, receiver TX1,
The transmitting and receiving elements (electrical distortion transducers) of each ultrasonic wave in TX2, RX1, and RX2 are shown, respectively.

In the rear warning device for a running vehicle configured as described above, after the main power source 4 is turned on, the warning display device 2 is activated in response to the driving operation when the vehicle is backing up.
We are taking measures to gradually test the operation of the aircraft and provide optimal rear warning.

That is, first, when the main power switch M/SW of the operating device 3 is pressed to turn on the main power 4 to the rear warning device and then the vehicle is put into reverse gear, the detection output of the gear shift position sensor S1 As a result, the signal processing device 1 enters the test mode, gives drive commands to the buzzer and direction display section of the alarm display device 2, and for a short period of time (about 0.8 seconds) causes the buzzer to sound and all lamps D1, D2, and D3 to turn off. The driver is asked to check whether the warning display is normally displayed.

Next, after the test mode is completed, the signal processing device 1
detects that the vehicle's gear is continuously in the back position and enters obstacle detection mode. The signal processing device 1 transmits ultrasonic waves and puts the receiver in a driving state,
The reception states of the receivers RX1 and RX2 are sequentially switched and read, and the presence or absence of obstacles in each direction is detected. When an obstacle is detected, the direction indicator lamps D1, D2, and D in the alarm display device 2 are activated.
3 lights up at the same time, and a buzzer sounds for a short period of time (approximately 0.8 seconds) to alert the driver. Note that this obstacle detection mode is executed without the condition that the vehicle is stopped or running, but when the vehicle is traveling forward at a certain speed or higher (for example, 20 km/h or higher), the obstacle detection mode at that time is executed. The signal processing device 1 forcibly brings the rear warning device into a stopped state in accordance with the output of the vehicle speed sensor S3.

Next, when the driver operates the vehicle's brakes in the obstacle detection mode and presses the display switch D/SW on the operating device 3, the signal processing device 1 indicates that the vehicle is in the brake operating state and that the gear is in reverse. The obstacle details display mode is entered by detecting that the gear is shifted to a position other than back, or detecting that the gear is shifted to a position other than back. In that case,
The signal processing device 1 includes an ultrasonic receiver RX1 or
The direction of the obstacle behind the vehicle is determined according to the obstacle detection state by RX2, and each direction indicator lamp D1,
Light up D2 and D3 appropriately. At the same time, the signal processing device 1 calculates the distance to the nearest obstacle based on the time from when the ultrasonic wave is transmitted until it is reflected by the nearest obstacle and received, and the signal processing device 1 calculates the distance to the nearest obstacle, The display unit will digitally display the distance in units of 0.1m.

In the present invention, as shown in FIG. 8, a direction display part is provided on the back of the warning display device 2 so that the driver can see the lighting status of the direction display lamps D1, D2, and D3 on the display surface. When the vehicle is stopped, the person standing behind it is detected as an obstacle, and the direction display lamps D1, D2, D3 are installed.
The operating state of the rear warning device can be checked while checking the lighting state of the rear warning device.
In this case, press the main power switch M/SW on the operating device 3 to switch the main power 4 to the rear warning device.
When the display switch D/SW is turned on and the display switch D/SW is pressed, the rear warning system is activated. Further, when the display switch D/SW is pressed again, the user check mode is canceled and the rear warning device is prepared for rear warning when the vehicle is backed up.

Effects As described above, the rear warning device for a running vehicle according to the present invention includes an ultrasonic transmitter and receiver installed to detect obstacles behind the vehicle, and an ultrasonic transmitter and receiver installed to detect obstacles behind the vehicle. A signal processing device that performs transmission and reception control and detects obstacles according to received signals, and an alarm display device that displays an alarm under the control of the signal processing device when an obstacle is detected. , a display section is installed on the back of the alarm display device that allows the user to view the alarm display status on the display surface from the rear of the vehicle, allowing the user to stand at the rear of the vehicle and place himself or herself behind the vehicle during a pre-work inspection. This has the excellent advantage of being able to check the operational status of the rear warning system while checking the direction display status.

[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 dividing the rear of the vehicle into two, and Fig. 2 is a diagram showing the rear warning of a running vehicle according to the present invention. A block configuration diagram showing one embodiment of the device, FIG. 3 is a diagram showing the combination of ultrasonic transmitter and receiver for detecting each obstacle when the rear of the vehicle is divided into three parts, and FIG. A diagram showing an example of the configuration of a display surface in an alarm display device,
Fig. 5 is a perspective view showing the appearance of the warning display device as seen from the front, Fig. 6 is a diagram showing an example of the configuration of the operating device in the same embodiment, and Fig. 7 is a diagram showing each component of the rear warning device installed in a car. A diagram showing an example of a state in which
FIG. 8 is a perspective view showing the appearance of the alarm display device as seen from the back side. 1...Signal processing device, 2...Alarm display device, 3
...Operation device, 4...Main power supply, TX1, TX2...
...Ultrasonic transmitter, RX1, RX2...Ultrasonic receiver, 01-03...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)

[Scope of utility model registration request] The ultrasonic transmitter and receiver are installed to detect obstacles behind the vehicle, and the ultrasonic transmitter and receiver are controlled to transmit and receive, and the obstacle is detected according to the received signal. In the rear warning system for a running vehicle, the warning display device includes a signal processing device for detecting an obstacle, and a warning display device for displaying a warning under the control of the signal processing device when an obstacle is detected. A rear warning device for a running vehicle, characterized in that a display unit is provided at the rear of the vehicle interior so that the status can be viewed from the rear of the vehicle.