JPH0999792A - Rearward monitoring and alarming device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove the necessity for providing both of a detecting/alarming device for a vehicle approaching from the rear and a device for detecting an obstacle existing at the rear by making a single alarm, in which an ultrasonic sensor is used in common, fulfil both functions, or a function of an inter-vehicle distance alarm device and that of backward obstacle detecting device. SOLUTION: In a judgment changing means 7, when a shift lever is positioned at 'forward', the time for judging the reflection time by a reflection time judging means 3 is prolonged, while, when the shift lever is positioned at 'reverse', the time is shortened. Thus, when the shift lever is positioned at 'forward', a rearward monitoring and alarming device serves as a device for detecting (and alarming) the inter-vehicle distance, in which a high-mount stop lamp turns on and off in accordance with an alarm signal outputted from reflection time judging means 3 when a succeeding car approaches to this car by entering a certain range, while, when the shift lever is positioned at 'reverse', it serves as a device for detecting in obstacle existing in the rear. Thus, through the device is a single one, it fufils two functions, or that of a device for detecting (alarming) a car approaching from the rear and that of a device for detecting an obstacle existing in the rear.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inter-vehicle distance warning device for informing a limit value of a distance to a following vehicle which is running, and
The present invention relates to a rear obstacle detection device (back sonar) that detects an obstacle behind the vehicle when the vehicle moves backward and notifies the driver of the obstacle.

2. Description of the Related Art Conventionally, as a vehicle rear monitoring alarm device,
When the distance from a vehicle approaching from behind is detected using an ultrasonic sensor and a certain distance or more is approached, the combination lamp blinks to alert the driver of the vehicle behind, from the rear. An inter-vehicle distance detection alarm device as shown in FIG. 3 for an approaching vehicle has been proposed, and an obstacle behind the vehicle when the vehicle is moved backward is detected using an ultrasonic sensor to notify the driver. As such a rear obstacle detecting device (back sonar), for example, a device as shown in FIG. 4 has been proposed. Both of them use an ultrasonic sensor as a sensor as a detection means, but they perform different functions and do not have both functions. Therefore, if both functions are desired, 2 I was using a kind of alarm device.

[0003]

However, in the conventional vehicle-to-vehicle distance detection alarm device and rear obstacle detection device (back sonar) for an approaching vehicle from the rear,
Even though the same type of ultrasonic sensor is used as the sensor as the detection means, if both functions are desired because they have only one function each other, separate sensors are used. An ultrasonic sensor and two kinds of alarm devices had to be attached, which imposes an extra financial burden on the user. Also, since many users do not want to install this kind of alarm device, it is not installed from the beginning at the time of manufacturing the vehicle, but it is often installed at the time of purchasing the vehicle or after the purchase according to the user's wishes. Therefore, when the above-mentioned two types of alarm devices are attached, the work must be done at the shop or the user himself / herself each time, which is troublesome. Further, since the ultrasonic sensor needs to be mounted on the outer peripheral portion of the vehicle, it is necessary to make separate mounting holes in the vehicle, which is not only a troublesome work, but also a major problem that the design of the vehicle after mounting is deteriorated. was there.

[0004]

The present invention has been made to solve the above-mentioned problems, and is an ultrasonic sensor 1 for both transmission and reception which transmits ultrasonic waves and receives reflected waves from obstacles. And outputs a reflection time signal corresponding to the time from the transmission of the ultrasonic wave to the reception of the reflected wave by being connected to the ultrasonic sensor 1 to drive the ultrasonic sensor for oscillation and shape the amplified waveform of the received wave. The circuit means 2, the reflection time determination means 3 for outputting an alarm signal when the reflection time signal is input and the reflection time is shorter than a fixed time, and the high mount stop lamp by the alarm signal output from the reflection time determination means. In a vehicle rearward monitoring alarm device having a blinking drive circuit 5 for blinking 4, a detecting means 6 for detecting the position of a shift lever of the vehicle and the position of the shift lever are forward positions. Driven by the judgment time changing means 7 for increasing the judgment time of the reflection time of the reflection time judgment means 3 and for decreasing the reflection time of the reflection time judgment means 3 and the alarm signal output from the reflection time judgment means. The vehicle rear monitoring and warning device is characterized by having both functions of an inter-vehicle distance warning device and a rear obstacle detection device (back sonar) by having an alarm notification means 7 for the driver.

That is, with one alarm device that shares an ultrasonic sensor, when a vehicle is moving backward with a detection alarm device for a vehicle approaching from the rear, an obstacle behind the vehicle is detected to notify the driver. It is an object of the present invention to obtain a vehicle rear monitoring and warning device having both functions of a rear obstacle detection device (back sonar).

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a circuit block diagram showing an embodiment of a vehicle rear monitoring and warning device according to the present invention, in which reference numeral 1 denotes an ultrasonic sensor which is attached to a rear portion of the vehicle and transmits ultrasonic waves to the rear of the vehicle and obstacles. It is a sensor for both transmission and reception that receives the reflected wave from the circuit, and is connected to the circuit means 2. The circuit means 2 drives the ultrasonic sensor 1 to transmit and shapes the amplified waveform of the received wave to transmit ultrasonic waves. It outputs a reflection time signal corresponding to the time from when the reflected wave is received. Reference numeral 3 is reflection time determination means, and when the shift lever position detected by the detection means 6 for detecting the position of the shift lever of the vehicle is the forward position, the reflection time determination means 3 determines the reflection time. The judgment time changing means 7 for increasing the time and shortening the time at the backward position is connected to switch the judgment time.

Numeral 4 is a high-mount stop lamp, which is connected to the blinking drive circuit 5 and is blinked by an alarm signal output from the reflection time determining means 3 when the shift lever is in the forward position, and 8 is The alarm notification means is connected to the reflection time determination means 3 so as to be driven by the alarm signal output from the reflection time determination means 3 when the shift lever is in the backward position. FIG. 2 is a view showing an embodiment of a mounting structure of an ultrasonic sensor integrated with a fastening component for mounting a license plate in a vehicle according to the present invention, and 9 is a bolt 10 as a typical example of a license plate fixing member. A recess 11 is formed in the head 9a of
In the inner part of the recess 11, that is, the center of the screw shaft of the bolt 10,
A through hole 12 is provided. An ultrasonic sensor 1 for measuring a distance from an obstacle is fitted into the recess 11 by transmitting an ultrasonic wave and receiving a reflected wave of the ultrasonic wave, and a lead wire 13 of the ultrasonic sensor 1 penetrates the concave portion 11. Hole 12
And is connected to the circuit means 2 in the vehicle. 14 in the figure
Is the rear body of the vehicle, and the interior is a trunk room 15. On the outer surface of the body 14, the number frame 1
6 is fixed, and the license plate 17 is fitted in the license frame 16. A nut 19 is welded and fixed to the inner surface of the insertion hole 18 of the body 14, and the bolt 10 having the ultrasonic sensor 1 is screwed and fixed to the nut 19 from the outside of the license plate 17.

The vehicle rear monitoring alarm device of the present invention is constructed as described above, and the determination time of the reflection time determination means 3 for outputting an alarm signal is set to the position of the shift lever of the vehicle detected by the detection means 6. In response, that is, when the position of the shift lever is the forward position, the determination time changing means 7 is provided to make the determination time of the reflection time of the reflection time determination means 3 longer and to make it shorter when the position is the reverse. Thus, when the position of the shift lever is in the forward position, the following signal is detected by the warning signal output from the reflection time determination means when the following vehicle approaches within a certain vehicle distance. It functions as a device, and when it is in the retracted position, it also acts as an obstacle detection device (back sonar) at the time of retreat, so it shared the ultrasonic sensor. With each alarm device, both a detection alarm device for a vehicle approaching from behind and a rear obstacle detection device (back sonar) that detects an obstacle behind the vehicle when the vehicle is moving backward and informs the driver It has a function.

[0009]

As described above, the vehicle rear-viewing alarm device according to the present invention is one alarm device that shares an ultrasonic sensor, and is used as a detection alarm device for a vehicle approaching from the rear and a vehicle when the vehicle is retracted. Rear obstacle detection device (back sonar) that detects rear obstacles and notifies the driver
Since it has both functions of,
There is no need to install both a detection alarm device and a rear obstacle detection device (back sonar) for vehicles approaching from the rear, and the purpose can be achieved by installing only one ultrasonic sensor and device in the vehicle, which is economical for the user. The burden can be halved, and the troublesome work of attaching these to the vehicle can be reduced. Further, not only one ultrasonic sensor needs to be attached to the outer peripheral portion of the vehicle, but also the ultrasonic sensor is integrated with the fastening component for attaching the license plate, so that the design of the vehicle after the ultrasonic sensor is attached is not deteriorated.

[Brief description of drawings]

FIG. 1 is a circuit block diagram of a vehicle rear monitoring alarm device according to the present invention.

FIG. 2 is a sectional view showing a mounting structure of an ultrasonic sensor according to the present invention to a vehicle.

FIG. 3 is a circuit block diagram of a conventional inter-vehicle distance detection alarm device.

FIG. 4 is a circuit block diagram of a conventional backward obstacle detection device.

[Explanation of symbols]

1 Ultrasonic sensor. 11 recess. 2 circuit means. 12 through holes. 3 Reflection time determination means. 13 Lead wire. 4 High mount stop lamp. 14 body. 5 Flashing drive circuit. 15 Trunk room. 6 Detection means. 16 number frames. 7 Judgment time changing means. 17 license plate. 8 Warning notification means. 18 Insertion hole. 9 License plate fixing member. 19 nuts. 10 volts. 20 combination lamps

Claims (2)

[Claims] 1. An ultrasonic sensor 1 for transmitting and receiving, which transmits an ultrasonic wave and receives a reflected wave from an obstacle, and an oscillating drive of the ultrasonic sensor connected to the ultrasonic sensor 1 and an amplified waveform of the received wave. Circuit means 2 for outputting a reflection time signal corresponding to the time from forming and transmitting an ultrasonic wave to receiving a reflected wave, and an alarm when the reflection time signal is input and the reflection time is shorter than a fixed time A vehicle rearward monitoring alarm device having a reflection time determination means 3 for outputting a signal and a blinking drive circuit 5 for blinking a high mount stop lamp 4 in response to an alarm signal output from the reflection time determination means When the detection means 6 for detecting the position of the lever and the shift lever are in the forward position, the reflection time determination means 3 makes the determination time of the reflection time longer, and When the vehicle is in a stationary position, the judgment time changing means 7 and the warning notification means 7 for the driver driven by the warning signal output from the reflection time judging means are provided to provide an inter-vehicle distance warning device and a rear obstacle. A vehicle rear monitoring alarm device that has the functions of both a detection device (back sonar). [0001] 2. A vehicle rear monitoring alarm device characterized in that, in the alarm device according to claim 1, the ultrasonic sensor 1 is integrated with a fastening component for attaching a license plate. [0002]