JPH0365452A - Front-car start informing device of automobile - Google Patents

Abstract

PURPOSE:To enable an automobile to be started without annoying the following cars in traffic congestion, crossing or the like by comparing data of measuring the distance between cars with similar data obtained right after the operation of a parking brake to generate a front car start informing sound when the distance between cars is changed by the start of the front car. CONSTITUTION:Data 14 of the distance between front and rear cars right after applying a parking brake are temporarily stored in a distance-between-cars data memory circuit 22 by a memory set signal 21 of data of the early distance between cars, while said data 14 at every subsequent measurement are stored to be successively renewed as data of a circuit 23 for storing the newest data of the distance between cars. The data of the distance between cars temporarily stored in the memory circuits 22, 23 are always compared with each other by a circuit 24 for comparing the data of the distance between cars. When at least a certain value of difference between the said data is detected, a generated difference detecting signal is outputted and an information drive signal 30 is applied to an informing sound signal output circuit 29 while a judging requirement for a control circuit 10 is added, so that a front car start informing sound 33 is outputted from a informing sound generator 32 according to the amplified output signal.

Description

[Detailed description of the invention] (Industrial application field) This invention relates to a device for automobiles.

In particular, it relates to a notification device for drivers.

(Prior art and its problems) Conventionally, when a car stops in a traffic jam or at an intersection while the car is driving, the driver must always keep an eye on whether or not the car in front will start moving. When I look away from the car in front of me,
There were inconveniences such as the car in front of you not noticing even if it started and went far, causing a delay in the timing of the start and causing inconvenience to the car behind you, or the cars behind you honking their horns at you.

(Purpose of the Invention) This invention was made in order to eliminate the above-mentioned drawbacks, and it is equipped with a sensor that confirms the start of the vehicle in front of the vehicle. The driver attempted to notify the driver that the vehicle in front of him had started moving.

(Detailed Description of the Invention) In the front vehicle start notification device of the present invention, a sensor is provided at the front end of the vehicle to confirm the stopped state of the front vehicle, and a detection signal from the sensor is used to control the i11 control circuit. With this device, which is equipped with an alarm and an alarm, when the car temporarily stops at a traffic jam or an intersection while the car is driving, the ignition alarm will alert Switch ON-OFF status and parking brake switch (also called handbrake)
ON-OFF status and O of the front vehicle start notification activation switch.
It is determined based on the N-OFF state and that the following distance data is within a certain value range, and the following distance sensor continues to detect the distance between the vehicle and the stopped vehicle immediately before the vehicle in front of the vehicle has started. When the inter-vehicle distance changes, the change in inter-vehicle distance is determined to be the start of the vehicle in front, and the driver is notified of the start of the vehicle in front by a notification sound.

(Example) Next, an example of the present invention will be described with reference to the drawings. The figure is a circuit configuration diagram showing one embodiment of the front vehicle start notification device according to the present invention.

In the figure, reference numeral 1 denotes an ultrasonic wave emitting/receiving device, which is installed at the tip of the car body, and emits ultrasonic waves 2 toward the car in front, and receives ultrasonic waves 2 reflected and incident on the former. Generate a detection signal. Reference numeral 3 denotes an input/output switching circuit which switches the input/output direction of the signal to the ultrasonic radiation/receiver 1, and converts the ultrasonic output signal 5 generated by the ultrasonic signal generation circuit 4 into an ultrasonic wave during the ultrasonic radiation process. In the ultrasonic reception process, the ultrasonic detection signal 6 detected by the ultrasonic radiation receiver 1 is input to the ultrasonic input signal reproducing circuit 7. 8 is an ultrasonic signal input/output line. 9 is a reflected wave input timing signal, which generates a timing pulse at the timing when the ultrasonic detection signal 6 is incident. Reference numeral 10 denotes a $ control circuit, which controls the entire circuit of this device, and outputs an input/output switching signal 11 that gives switching timing to the input/output switching circuit 3;
Ultrasonic output timing signal 12 to ultrasonic signal generation circuit 4
is input, and at that timing, the ultrasonic wave emitting/receiving device 1 emits ultrasonic waves toward the vehicle in front. 13 is the inter-vehicle distance measurement circuit,! A counter is provided to count the clock signal 31 inputted from the 1m circuit 10, and the clock signal 31 is counted between the input point of the ultrasonic output timing signal 12 inputted from the $ control circuit 10 and the input point of the reflected wave input timing signal 9. The number is counted and the counted number is output as inter-vehicle distance data 14 with respect to the vehicle in front. Then s
'gw time, 110, as a means of establishing a limiting condition for operating this device, an O signal from the ignition switch 15 is turned on to determine that the engine of the automobile is in operation.
N-OFF signal 16 and ON- from the parking brake switch 17 for determining that the vehicle is stopped.
An OFF signal 18 and an ON-OFF signal 20 from a front vehicle start notification activation switch 19, which manually switches whether or not to activate the front vehicle start notification device, are input.

21 is a memory set signal for initial inter-vehicle distance data output from the fIJvli circuit 10 immediately after the parking brake is applied (approximately 1 to 3 seconds later), and the inter-vehicle distance immediately after the parking brake is applied is stored in the inter-vehicle distance data storage circuit 22. Data 14 is stored. Reference numeral 23 denotes the latest inter-vehicle distance data storage circuit, which repeats measurement from immediately after the parking brake is applied until the vehicle in front starts moving, based on the data set signal 25 inputted from the control circuit 10 at intervals of - to several times per second. Inter-vehicle distance data 14 is input and stored. 24 is an inter-vehicle distance data comparison circuit which compares inter-vehicle distance data 26 immediately after the parking brake operation is output from the inter-vehicle distance data storage circuit 22, and the latest inter-vehicle distance data 27 output from the latest inter-vehicle distance data storage circuit 23.
When the difference is greater than a certain value, a difference detection signal 28 is output. The difference occurrence detection signal 28 is once input to the Ig control circuit 10, and the control circuit 10 determines whether or not the inter-vehicle distance data 14 immediately after the parking brake operation is within a certain value range. The conditions for stopping the notification operation when the vehicle stops at the front of the vehicle and issuing a start notification based on the states of the ignition switch 15, parking brake switch 17, and front vehicle start notification activation switch 19 are met. Only occasionally, the notification opening signal 30 is applied to the notification sound signal output circuit 29, and the increased output signal causes the notification sound generator 32 to output the front vehicle start notification sound 33.

(Function) When a car is equipped with the front vehicle start notification device having the above configuration and the ultrasonic wave emitting/receiver l is installed at the front end of the car, such as a bumper, the front car start notification activation switch 19 is activated. After turning on the ignition switch 1, when you approach the vehicle in front while waiting at a traffic light or in traffic jams, stop the vehicle, and apply the parking brake, the control circuit 10 turns on the ignition switch 1.
5 is ON, it is determined that the engine of the automobile is running, and when the front vehicle start notification activation switch 19 is ON, it is determined that the front vehicle start notification state is set. Based on the condition in which it is determined that the vehicle is stopped once the signal is turned ON, the ultrasonic output timing signal 12 is input from the control circuit 10 to the ultrasonic signal generation circuit 4, and the input/output switching circuit 3 switches input/output. In a state in which the output mode is set by the signal 11, the ultrasonic output signal 5 is applied to the ultrasonic wave emitting/receiving device 1, and the ultrasonic wave 2 is emitted toward the vehicle in front. Immediately after the ultrasonic wave is emitted, the input/output switching circuit 3 is switched to the input mode, and the ultrasonic wave 2 reflected by the vehicle in front is input to the ultrasonic emitting/receiving device 1 and an ultrasonic detection signal is detected. 6 is inputted to an ultrasonic input signal reproducing circuit 7, and is inputted as a reflected wave input timing signal 9 to an inter-vehicle distance measurement path 13. The inter-vehicle distance measurement circuit 13 counts the number of clock signals 31 during the period between the ultrasonic output timing signal 12 and the reflected wave input timing signal 9, and outputs the counted number as inter-vehicle distance data 14. This measurement of the inter-vehicle distance is repeated in a cycle back and forth from once to several times per second. Here, the inter-vehicle distance data 4 with respect to the vehicle in front immediately after the parking brake is applied is set to the memory set signal 21 of the initial inter-vehicle distance data. - The following distance data 14 is temporarily stored in the inter-vehicle distance data storage circuit 22 immediately after the brake operation, and the inter-vehicle distance data 14 for each subsequent inter-vehicle distance measurement is stored in a state in which the latest data in the inter-vehicle distance data storage circuit 23 is updated one after another. Ru. The inter-vehicle distance data temporarily stored in the memory circuit 22 and the memory circuit 23 are constantly compared in the inter-vehicle distance data comparison circuit 24, and a difference of more than a certain value in the inter-vehicle distance data (in the embodiment, the count value of the clock 31) is detected. At the same time, the difference occurrence detection signal 28 is output, and while taking into consideration the discrimination condition of I11 control @ route lO, the notification arousal signal 30 is applied to the notification sound signal output circuit 29, and the amplified output signal causes the notification sound generator 32 to be output. The front vehicle start notification sound 33 is output from the front vehicle start notification sound 33.

(Effects) According to the front vehicle start notification device of the present invention, when the vehicle approaches the vehicle in front at traffic jams, intersections, etc. while driving and once stops, if the parking brake is pulled, the line of sight Even if you remove the car from the car in front of you and close your eyes, or shift your gaze to the side of the car or your hand, the alarm will sound as soon as the car in front of you starts, so you can start your car quickly without bothering the car behind you. I can do it.

Here, if the front vehicle start notification activation switch 19 is turned OFF, the front vehicle start notification activation device stops operating and operates exactly the same as a conventional vehicle without a front vehicle start notification device.

[Brief explanation of drawings]

The figure is a circuit configuration diagram of a front vehicle start notification device according to the present invention. In the figure, 1 is an ultrasonic wave receiver, 2 is an ultrasonic wave receiver, and 3 is an ultrasonic wave receiver.
is an input/output switching circuit, 4 is an ultrasonic signal generation circuit, 5 is an ultrasonic output signal, 6 is an ultrasonic detection signal, 7 is an ultrasonic input signal regeneration circuit, 8 is an ultrasonic signal input/output line, 9 is a reflection wave input timing signal, 10 is the II control circuit, 11 is the input/output switching signal, 12 is the ultrasonic output timing signal, 13 is the inter-vehicle path a measuring circuit, 31 is the clock signal, 14 is the inter-vehicle distance data, 15 is the ignition signal. Switch, 16 is ON-
OFF signal, 17 is parking brake switch,
18 is an ON/OFF signal, 19 is a front vehicle start notification activation switch, 20 is a LtON-OFF signal, 21 is a memory set signal, 22 is an initial inter-vehicle distance data storage circuit, 23 is an updated inter-vehicle distance data storage circuit, and 24 is an inter-vehicle distance Data comparison circuit, 26 and 27 are inter-vehicle distance data, 28 is a difference detection signal, 29 is a notification sound signal output circuit, 30 is a notification behavior signal, 32 is a notification sound generator, and 33 is a front vehicle start notification sound. .

Claims (2)

[Claims] (1) A means for determining when a car approaches the vehicle in front and once stops while driving, a means for measuring the distance between vehicles when the vehicle approaches the vehicle in front and once stops, and data on the distance between vehicles immediately after the parking brake is operated. The system measures the distance between the vehicle in front and the vehicle in front every moment immediately after the parking brake is applied, and constantly compares the distance measurement data with the distance data immediately after the parking brake is applied, and the vehicle in front starts moving. A front vehicle start notification device is characterized in that it generates a front vehicle start notification sound when the inter-vehicle distance changes and a difference occurs between the two. (2) As a means of determining whether the vehicle is approaching the vehicle in front and has stopped, and is waiting for the sound of the vehicle in front of the vehicle to start, the ON/OFF state of the ignition switch is used. ON-OFF status of parking brake switch and ON-OFF status of front vehicle start notification activation switch
2. The front vehicle start notification device for a motor vehicle according to claim 1, wherein the determination is made based on the F state and the fact that the inter-vehicle distance data is within a certain value range.