JPH04152500A - Ultrasonic alarm device for vehicle - Google Patents

Abstract

PURPOSE:To prevent the inconvenience when the inter-car distance exceeds a prescribed distance by detecting a reflected ultrasonic wave obtained by a fact that an ultrasonic wave oscillated from an ultrasonic oscillator attached to the front of a vehicle is reflected by a vehicle positioned within a prescribed distance in front. CONSTITUTION:An ultrasonic alarm device is attached to a passenger car, and an ultrasonic oscillator 4 and an ultrasonic sensor 5 are attached to the left and the right fitting pieces 2, 3 of a fitting plate 1. Also, an alarm device main body 6 is installed in a place being hear a driver's seat. When an automobile stops behind the passenger car right in front in an intersection, etc., in the course of running, the sensor 5 receives an ultrasonic wave obtained by a fact that the ultrasonic wave from the oscillator 4 is reflected by the passenger car right in front, and outputs a receiving signal to the main body 6. As a result, the main body 6 enters into an attitude for monitoring a distance to the passenger car right in front. When the passenger car right in front starts in this state, and the inter-car distance exceeds a prescribed distance, the sensor 5 cuts off the output of the receiving signal, and the main body 6 sounds an alarm buzzer 7. In such a way, at the time of waiting for a signal in an intersection, etc., the start of a vehicle right in front can be known immediately, and a traffic jam can be prevented.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is designed to prevent a delay in the start of the own vehicle when a plurality of vehicles are waiting at a traffic light at an intersection, for example, and a vehicle in front of the vehicle starts. If you issue a warning to warn people to be careful, or if you do not apply the brakes lightly, such as when there is a traffic jam with multiple vehicles on an uphill road, your vehicle may back up without you noticing, causing the gap between you and the vehicle in front to increase. The present invention relates to an ultrasonic warning device for a vehicle that can issue a warning in such a case to prevent a collision with a following vehicle.

(Prior art) Conventionally, when multiple vehicles are waiting at a traffic light at an intersection, etc., if the driver of the vehicle is writing, closing his eyes, or looking to the side, , even if the vehicle in front of you starts, you may not notice it, and as a result, your own vehicle may start slowly, causing heavy traffic jams at intersections and the like.

Alternatively, if the brakes of the own vehicle are weak, such as when there is a traffic jam with multiple vehicles on an uphill road, the driver may not notice if the own vehicle backs up and may collide with the following vehicle.

(Problems to be Solved by the Invention) Therefore, in the present invention, after the own vehicle approaches the vehicle directly ahead within a predetermined distance and stops, the vehicle directly ahead starts, and the distance between the own vehicle and the vehicle immediately ahead is set to a predetermined distance. If the distance is exceeded, a warning can be issued to prompt the driver of the vehicle to start quickly, and the driver can quickly notice that the vehicle is backing up on an uphill road. It is intended to be a technical means to be solved.

(Means for Solving the Problems) The technical means for achieving the above object is to combine an ultrasonic warning device of a vehicle with an ultrasonic oscillator attached to the front of the vehicle, and a vehicle equipped with the ultrasonic oscillator. An ultrasonic device that is attached to the front of the same vehicle and detects the reflected ultrasonic wave when the ultrasonic wave emitted from the ultrasonic oscillator is reflected by a vehicle located directly ahead within a predetermined distance in front, and outputs the detection signal. When inputting the detection signal from the ultrasonic sensor, the sensor enters a monitoring state in which the distance between the vehicle immediately ahead is monitored, and when the input of the detection signal is cut off in the monitoring state, the distance between the sensor and the vehicle immediately ahead is monitored. The structure includes an alarm circuit that outputs an alarm signal when determining that the distance to the vehicle has exceeded a predetermined distance, and an alarm means that receives the alarm signal output from the alarm circuit and issues an alarm. be.

(Function) According to the ultrasonic warning device for a vehicle configured as described above, when a vehicle equipped with the ultrasonic warning device stops, for example at an intersection, if a vehicle immediately ahead has stopped within a predetermined distance, the ultrasonic warning device The ultrasonic waves emitted from the sonic oscillator are reflected by the vehicle directly ahead. When the ultrasonic wave reflected by the vehicle immediately ahead is detected by the ultrasonic sensor, a detection signal is output from the ultrasonic sensor to the alarm circuit. The alarm circuit into which the detection signal is input enters a monitoring state in which it monitors the distance to the vehicle directly ahead, and if the input of the detection signal is cut off in the monitoring state, the vehicle immediately ahead starts or starts driving. When the vehicle backs up and the distance from the vehicle directly ahead increases, it is determined that the distance to the vehicle immediately ahead exceeds a predetermined distance, and a warning signal is output. When this alarm signal is input to an alarm means such as a buzzer or a lamp, the alarm means issues an alarm that the distance to the vehicle immediately ahead has exceeded a predetermined distance.

(Example) Next, an example of the present invention will be described with reference to the drawings.

Figure 1 is a front view of a mounting plate l formed in a size that allows the installation of a license plate NP for a vehicle such as a regular or large vehicle, and Figure 2 is a right side view of Figure 1. 3 is a view taken along arrow AA in FIG. 1, and the plate 1 is attached at the position where the front license plate of the vehicle is attached. As shown in Figures 1 to 3, the installation is done on plate 1.
The lower left and lower right parts are bent into an L shape, with piece 2 for the left attachment and piece 3 for the right attachment.

The ultrasonic oscillator 4 is attached to the piece 2 for the left-hand mounting, and the ultrasonic sensor 5 is attached to the piece 3 for the right-hand mounting. Note that the ultrasonic oscillator 4 and the ultrasonic sensor 5 may be attached to either the left or right position.

FIG. 4 is a front view of the ultrasonic oscillator 4 and the ultrasonic sensor 5, FIG. 5 is a right side view, and FIG. 6 is an A-A in FIG. 4.
It is an arrow view.

As shown in the figure, the ultrasonic oscillator 4 and the ultrasonic sensor 5 are formed in the same shape. In order to make it easier to collect reflected ultrasonic waves when the oscillated ultrasonic waves from 4 are reflected at the rear of the vehicle immediately ahead, elliptical hoods 4A and 5A are provided, respectively. In the center of each of the elliptical hoods 4A and 5A, there is an oscillation window 4B.
A reception window 5B is formed. In addition, the ultrasonic oscillator 4
An ultrasonic transducer is provided inside the ultrasonic sensor 5, and an ultrasonic receiver is provided inside the ultrasonic sensor 5.

FIG. 7 is an electrical system diagram showing the overall configuration of the ultrasonic warning device for a vehicle.

The alarm device body 6 to which the ultrasonic oscillator 4 and the ultrasonic sensor 5 are electrically connected is installed near the driver's seat of the vehicle, and has an alarm buzzer 7 and a monitoring status confirmation lamp 8 on its panel surface. , a reset switch 9, a power switch 10 with a built-in power lamp, and the like. and power switch I
When O is turned on, the required power is supplied from the power source 11A such as a battery to the alarm device main body 6, and a high frequency current is applied to the ultrasonic oscillator 4. When this high frequency current is applied to the ultrasonic oscillator 4, the ultrasonic oscillator 4
oscillates an ultrasonic wave with a frequency corresponding to that frequency.

At the same time, the ultrasonic sensor 5 outputs a reception signal when the ultrasonic sensor 5 receives a reflected ultrasonic wave when the ultrasonic wave oscillated from the ultrasonic oscillator 4 is reflected by a vehicle directly ahead that has stopped within 3 meters, for example. Then, the received signal is transmitted to the alarm device main body 6.

Next, the operation of the ultrasonic alarm device configured as described above will be explained with reference to FIG.

In FIG. 8, the ultrasonic alarm device according to the present invention is installed in a passenger car 11, and the ultrasonic oscillator 4 and the ultrasonic sensor 5 are mounted on the left side of the plate 1 as described above. , and the right-hand mounting is attached to piece 3. Further, the alarm device main body 6 is installed near the driver's seat so that the driver can directly operate it. When this passenger car 11 is traveling and stops behind the passenger car 12 directly ahead at an intersection or the like, for example, at an interval of 2 meters, the ultrasonic sensor 5 detects that the ultrasonic waves oscillated from the ultrasonic oscillator 4 strike the passenger car 12 directly ahead. It receives the reflected ultrasound waves and outputs a received signal. When this reception signal is input to the alarm device main body 6, the alarm device main body 6 enters a monitoring state in which it monitors the distance to the passenger car 12 immediately ahead, and lights up the monitoring state confirmation lamp 8.

In this monitoring state, the passenger car 12 starts, and the passenger car 11
When the distance between them exceeds the reference distance of 3 meters, the ultrasonic sensor 5 acts to cut off the output of the received signal. When this received signal is interrupted, the alarm device main body 6
The passenger car 12 starts, the driver judges that the distance between the passenger car 12 and the passenger car 11 exceeds the reference distance of 3 meters, and sounds the warning buzzer 7. When the alarm buzzer 7 sounds in this way, the driver can recognize that the passenger car 12 has started, so if the driver is writing, closing his eyes, or looking to the side, This eliminates the delay in the start of one's own vehicle, and eliminates the inconvenience caused by the delay in the start of the following vehicle and worsening of traffic jams, even when the driver is watching the vehicle.

In addition, the passenger car 11 may back up not only at an intersection but also when the passenger car 12 in front of you starts moving, such as when there is a traffic jam with multiple vehicles on an uphill road, or if the brakes of the passenger car 11 are weakly applied. However, the driver will be able to immediately notice that he or she is backing up, thereby preventing a collision with a following vehicle.

Note that the alarm buzzer 7 continues to sound until the reset switch 9 is pressed.

(Effects of the Invention) As described above, according to the present invention, after the own vehicle approaches the vehicle directly ahead and stops, an alarm is issued when the distance between the own vehicle and the vehicle directly ahead exceeds a predetermined distance. It is possible to alert the driver of the own vehicle, so when there are multiple vehicles or waiting at a traffic light at an intersection, etc., if the driver of the vehicle is writing, closing his eyes, or Even if you are looking in the direction, you will be able to instantly know when the vehicle in front of you has started, and you will be able to prevent the inconvenience caused by delays in starting your own vehicle and worsening traffic jams. In addition to this, it is also possible to give the driver peace of mind.

Or, not only at an intersection, but also when there is a traffic jam with multiple vehicles on an uphill road, etc., when the vehicle in front of you starts moving, or if the brakes are not applied properly, you will immediately notice if your vehicle backs up. This will help prevent collisions with following vehicles.

[Brief explanation of drawings]

The drawings relate to an embodiment, and FIG. 1 is a front view of the plate showing the mounting, FIG. 2 is a right side view of FIG. 1, and FIG. 3 is a view taken along the line I--A in FIG. 1. In addition, Fig. 4 is a front view of the ultrasonic oscillator and ultrasonic sensor, Fig. 5 is a right side view, Fig. 6 is a view taken along arrow A-A in Fig. 4, and Fig. 7 is a vehicle ultrasonic alarm. An electrical system diagram showing the overall configuration of the device, and FIG. 8 is an explanatory diagram of the operation. 1: Mounting plate 2: Left mounting 3 pieces: Right mounting 4 pieces: Ultrasonic oscillator 4A: Hood 5: Ultrasonic sensor 5A: Hood 6: Alarm device body 7: Alarm buzzer 8: Monitoring status confirmation Ramp 11: Passenger car 12: Passenger car immediately ahead

Claims (1)

[Claims] An ultrasonic oscillator attached to the front of a vehicle, and a vehicle directly ahead of the vehicle that is attached to the front of the same vehicle to which the ultrasonic oscillator is attached, and within which the ultrasonic waves emitted from the ultrasonic oscillator are located within a predetermined distance. A monitoring state that monitors the distance between an ultrasonic sensor that detects reflected ultrasonic waves when reflected by and outputs a detection signal, and the vehicle immediately ahead when the detection signal from the ultrasonic sensor is input. and an alarm circuit that determines that the distance to the vehicle immediately ahead has exceeded a predetermined distance and outputs an alarm signal when the input of the detection signal is cut off in the monitoring state; 1. An ultrasonic warning device for a vehicle, comprising: warning means for inputting a warning signal and issuing a warning.