JPS6031075A - Apparatus for detecting rear obstruction to issue alarm - Google Patents

Abstract

PURPOSE:To attain to reduce an accident in altering a lane, by issuing an alarm by detecting whether an obstruction such as a succeeding vehicle is present or not on a lane intended for alteration. CONSTITUTION:A control circuit 2 outputs a drive signal to a rear sensor driving circuit 3 when the output of a car speed detecting circuit 1 reaches a set car speed or more to drive a rear sensor 4. The output of the sensor and the outputs of direction indicating switches 5L, 5R in left and right sides are connected to the circuit 2 and, when the obstruction detected by the sensor 4 is present in the side to which the switches 5L, 5R output, an alarm signal is outputted. In this case, the alarm signal of the circuit 2 drives an alarm apparatus 7 through an alarm apparatus driving circuit 6.

Description

[Detailed Description of the Invention] The present invention detects and warns whether there is a following vehicle behind the lane (1) to which the driver is changing lanes when changing lanes. Regarding equipment.

Conventionally, when a vehicle changes lanes, it looks in its rearview mirror or directly looks behind it to visually confirm whether there is a vehicle following in the lane to which it is changing. However, with this method, the vehicle behind you may end up in the blind spot of your rearview mirror, making it impossible to see what's behind you.
Also, if you look directly behind you while driving, you will not be paying attention to the road ahead, which can be extremely dangerous, especially when driving at high speeds.

Utility Model Application Publication No. 52-146443 "Obstacle Detection Device for Vehicles" generates ultrasonic waves intermittently, and when it is detected that the ultrasonic waves are reflected by an obstacle within a certain period of time, discloses a device that can detect the presence of an obstacle behind a vehicle.

This device is used to find out the position of the rear wall, etc. when parking in a narrow space.

However, when this device is used to check whether there are any vehicles following in the lane to be changed (2) when changing lanes, it detects all the vehicles traveling behind, causing the driver to switch to the right or left lane. I didn't know if there was a car behind me that could be an obstacle. In addition, it would be inconvenient if the driver had to detect approaching obstacles on the left or right and issue a warning each time he or she tries to turn left or right.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a device for detecting and warning a rear obstacle that can detect and warn whether or not there is a following vehicle behind the lane to be changed when changing lanes. There is a particular thing.

In order to achieve the above object, the device for detecting rear obstacles and giving a warning according to the present invention includes a vehicle speed detection circuit that detects and outputs the actual vehicle speed of the vehicle, and a device that detects obstacles existing on the left and right rear of the vehicle. a rear sensor that outputs a signal, left and right direction switches that operate in conjunction with a direction indicator that instructs the vehicle to change course, an output of the vehicle speed detection circuit, an output of the rear sensor, and each of the directions. When the output of the direction indicator switch is connected and the output of the vehicle speed detection circuit exceeds the set speed (3), the rear sensor is driven and the obstacle detected by the rear sensor is output from the direction indicator switch. It is comprised of a control circuit that outputs an alarm signal when the vehicle is on the side where the vehicle is located, and an alarm device that is driven by the alarm signal that is output from the control circuit.

According to the above structure, the object of the present invention can be completely achieved.

Hereinafter, the present invention will be explained in more detail with reference to the drawings and the like.

FIG. 1 is a block diagram showing an embodiment of a device for detecting rear obstacles and giving an alarm according to the present invention, and FIG. 2 is a diagram showing a detection range of a rear sensor used in the device of the embodiment.
FIG. 3 is a flowchart for explaining the operation of the control circuit used in the apparatus of this embodiment.

The vehicle speed detection circuit 1 is a circuit for detecting the speed of a vehicle currently running. The purpose of detecting vehicle speed is to activate this device when the vehicle speed exceeds a set speed, and to distinguish between lane changes and low-speed left turns or (4) right turns, to prevent malfunctions. be. An output of the vehicle speed detection circuit 1 is connected to a control circuit 2.

One output of the control circuit 2 is connected to a rear sensor 4 via a rear sensor drive circuit 3. The rear sensor 4 is a sensor that detects whether or not there is an obstacle such as a following vehicle behind the vehicle. For example, obstacles behind the vehicle are detected based on the time it takes from the generation of ultrasonic waves until the ultrasonic waves are reflected by an obstacle and returned. Note that the rear sensor 4 is not limited to one that uses ultrasonic waves, but may be one that uses infrared rays. The rear sensor 4 is composed of a pair of left and right sensors 4L and 4R, and the shaded area in FIG. 2 is the range in which obstacles can be detected. The output of the rear sensor 4 is connected to the control circuit 2.

The direction indicating switch 5 is a switch that is closed in conjunction with a direction indicating device that indicates a change in the course of a running vehicle, and
It consists of a direction indicator switch 2L for the left side and a direction indicator switch 2R for the right side (5). The direction indicator switch 5 is a switch for detecting which side to change lanes to, and its output is sent to the control circuit 2.
It is connected to the.

The control circuit 2 outputs a drive signal to the rear sensor drive circuit 3 to drive the rear sensor 4 when the output of the vehicle speed detection circuit 1 exceeds the set vehicle speed, and also outputs a drive signal to the rear sensor drive circuit 3 to drive the rear sensor 4. Direction switch 5L, 5
The outputs of R are connected to each other, and an alarm signal is output when an obstacle detected by the rear sensor 4 is present on the output side of the left direction indicator switch 5L or the right direction indicator switch 5R. .

An alarm signal output from the control circuit 2 is connected to an alarm device 7 via an alarm device drive circuit 6.

The alarm device 7 is a visual device such as a normal lamp, liquid crystal, or LED, but it may also be an auditory device such as a voice synthesizer or a bell.

Next, the overall operation of the embodiment of the apparatus of the present invention will be explained with reference to the flowchart of the control circuit shown in FIG.

(6) The vehicle speed detected by the vehicle speed detection circuit 1 is input to the control circuit 2 (101).

The control circuit 2 determines whether the detected vehicle speed is equal to or higher than a set vehicle speed (102). When the detected vehicle speed is equal to or higher than the set vehicle speed, a drive signal is output to the rear sensor drive circuit 3,
The rear sensor 4 is driven (103).

When the rear sensor 4 is driven and its output is input to the control circuit 2 (104), it is determined whether an obstacle exists within the detection range of the rear sensor 4 (105).

When an obstacle is within the detection range, it is determined whether the obstacle is at a distance that is dangerous for changing lanes (104).
). Here, when the output of the direction indicating switch 5 is input to the control circuit 2 (107), it is further determined whether or not the obstacle is on the right rear side (105).

When the obstacle is on the right rear side, if the right direction switch 5R is on (109), a drive signal is output to the alarm device drive circuit 6 (111,), and (7) the alarm device 7 is driven. let

When the obstacle is not on the right rear, that is, on the left rear, and the left direction indicator switch 5L is on (110), a drive signal is output to the alarm device drive circuit 6 and <111). The alarm device 7 is activated.

As explained in detail above, according to the present invention, when changing lanes, the rear sensor detects whether or not there is an obstacle such as a following vehicle in the lane to which the lane is to be changed and gives a warning, so that accidents occur when changing lanes. The risk of

In particular, dangers such as rear-end collisions that occur when a slow vehicle veers into the right lane to avoid an obstacle on the left are avoided.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of a device for detecting rear obstacles and giving an alarm according to the present invention, and FIG. 2 is a diagram showing a detection range of a rear sensor used in the device of the embodiment.
FIG. 3 is a flowchart (8) for explaining the operation of the control circuit used in the device of the embodiment. ■... Vehicle speed detection circuit 2... Control circuit 3... Rear sensor drive circuit @ 4... Rear sensor 5... Direction indicator switch 6... Alarm device drive circuit 7... Alarm device Patent Applicant Suzuki Motor Co., Ltd. Agent Patent Attorney Hisashi Inoro (9) 1 Figure 22 = Procedural Amendment 1. Indication of the case Patent Application No. 138992 of 1982 2, device for detecting and alarming obstacles with the name of invention flJ 3, person making the amendment Relationship to the case Patent applicant 4, agent 6, making the amendment Target statement 7? ! Correct content Contents of correction as per Okisara (Japanese Patent Application No. 58-138992) fl, l From page 5, line 19 to line 20 of the specification [Direction switch 2L for left side and direction for right side Instruction switch 2RJ
is corrected to [the direction indicator switch 5L for the left side and the direction indicator switch 5RJ for the right side. (2) Change "Judged (104)" from the 13th line to the 14th line of page 7 of the specification to [Judged (106)]. ”
Correct to. (3) [Determined (105)] from line 16 to line 17 of page 7 of the specification. ] is “judged (10B).”
Correct to. Above (1)

Claims (1)

[Claims] A vehicle speed detection circuit that detects and outputs the actual vehicle speed of the vehicle, a rear sensor that detects and outputs obstacles existing on the left and right rear of the vehicle, and a direction indicating device that instructs the vehicle to change course. When the left and right direction indicator switches that are activated, the output of the vehicle speed detection circuit, the output of the rear sensor, and the output of each direction indicator switch are connected, and the output of the vehicle speed detection circuit exceeds the set speed. a control circuit that drives the rear sensor and outputs an alarm signal when an obstacle detected by the rear sensor is present on the output side of the direction indicator switch; and an alarm signal that is output from the control circuit. A device that detects and warns of obstacles in the rear, consisting of an alarm device driven by a