JPH07137577A - Sudden deceleration alarm device of automobile - Google Patents

Abstract

PURPOSE:To prevent an inconvenient condition to release an alarm even though a deceleration is being continued, by stopping the output of a drive control signal by the finish of timing of the first and the second specific times, in the system to inform a sudden deceleration of the car to the following cars. CONSTITUTION:A deceleration is calculated from the variation of the detected speed by a car speed detecting means 10 to detect the car speed, by a deceleration calculating means 11, and when the deceleration is larger than a specific value, a drive control signal is output by a control means 12, and an alarm 13 is operated through a driving means 14. In this case, the first specific time is measured from the starting of the output of the drive control signal by the first timer 15, and when the deceleration is continued in the time measuring, and the detected car speed is made smaller than a specific speed, the measuring of the second specific time is started by the second timer 16. And when the time measuring is finished by one side timer of the timers 15 and 16, or when an alarm releasing means 20 is operated, the output of the drive control signal by the control means 12 is stopped, so as to release the operation of the alarm 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle rapid deceleration warning device for informing a succeeding vehicle of a sudden vehicle deceleration.

[0002]

2. Description of the Related Art Conventionally, as a device for informing a succeeding vehicle of a sudden deceleration of an automobile in this manner, for example, Japanese Patent Laid-Open No. 4-3253.
There is one disclosed in Japanese Patent No. 31, which calculates the deceleration of the vehicle based on the signal from the vehicle speed sensor and blinks all the direction indicator lamps when the calculated deceleration becomes equal to or higher than the first value. A warning is issued to the following vehicle by the deceleration and the deceleration becomes smaller than the second value (<first value), and / or a predetermined time has elapsed from the start of blinking of all the direction indicator lamps. When is realized,
All alarms are canceled by stopping the blinking of all direction lamps as no alarm is required.

Further, as described in Japanese Patent Laid-Open No. 3-135851, when a predetermined deceleration is applied to the vehicle when the changeover switch is set to the automatic mode, a high signal is output from the vehicle speed sensor and the deceleration sensor. By this, the high signal is input to the timer via the AND circuit, the high signal is output from the timer for a predetermined time, the hazard unit is controlled by the control unit, and the front, rear, left and right direction indicator lights are simultaneously blinked for the predetermined time. In addition, there is also proposed a configuration in which, if the accelerator switch is turned on before the predetermined time has elapsed, the timer is reset to stop the blinking of the respective direction indicator lights.

[0004]

However, as described in each of these publications, the condition for alarm release is that a predetermined time has elapsed since the alarm was started, and the deceleration is smaller than a predetermined value. Then, in a state where the rapid deceleration is once performed and then gradually decelerated, the alarm may be canceled by the count-up of the timer even though the deceleration is continued.

Further, even if the driver judges that the alarm is not necessary due to the surrounding conditions after the driver suddenly brakes, the alarm cannot be appropriately canceled because there is no appropriate canceling means in the related art.

Therefore, the present invention has been made in order to solve the above-mentioned problems, and prevents the alarm from being released while the deceleration is continuing, and judges that the alarm is not necessary. The purpose is to be able to release the alarm appropriately under the circumstances.

[0007]

As shown in FIG. 1, a vehicle rapid deceleration warning device according to the present invention includes a vehicle speed detecting means 10 for detecting a vehicle speed and a deceleration based on a change in the speed detected by the vehicle speed detecting means 10. Deceleration calculation means 11, a control means 12 that outputs a drive control signal when the deceleration is greater than a predetermined value, and an alarm device 13 when the drive control signal is input.
A driving means 14 for driving the motor, a first timer 15 for measuring a first predetermined time from the start of the output of the drive control signal, and a first
The second timer 16 which starts counting the second predetermined time when the deceleration continues during the time counting by the timer 15 and the speed detected by the vehicle speed detecting means 10 becomes lower than the predetermined speed.
And an alarm releasing means 20 for releasing the drive of the alarm device.
Is provided, and the output of the drive control signal by the control means 12 is stopped on the condition that either one of the timers 15 and 16 completes the timing or the operation of the alarm canceling means 20. .

Further, the alarm detection means 20 may be an alarm release switch, a turn switch for indicating a direction, or an accelerator switch which is interlocked with the depression of the accelerator.

[0009]

According to the present invention, the deceleration is calculated by the deceleration calculating means 11 from the change in the speed detected by the vehicle speed detecting means 10. When the deceleration is larger than a predetermined value, the control means 12 drives the driving means 14. The control unit outputs the control signal to drive the alarm device 13 by the driving unit 14, and the first and second timers 15 and 16 respectively finish measuring the first and second predetermined times or operate the alarm canceling unit 20. Since the output of the drive control signal from the control means 12 is stopped, it is possible to prevent the alarm from being canceled even when the deceleration is continued, as in the conventional case, and it is determined that the alarm is not necessary. The alarm can be canceled as appropriate under the circumstances.

[0010]

1 is a block diagram of an embodiment of the present invention, and FIG. 3 is a flow chart for explaining the operation.

As shown in FIG. 2, the vehicle speed sensor 1 outputs a detection pulse corresponding to the vehicle speed of the vehicle, and the vehicle speed sensor 1
At the same time, the detection pulse is input to a control unit (hereinafter referred to as ECU) 2 that constitutes the vehicle speed detection means 10 to calculate the vehicle speed of the vehicle. The ECU 2 functions as the deceleration calculation means 11 and the control means 12 described above. The ECU 2 also has a function, and the ECU 2 derives the deceleration based on the detection pulse from the vehicle speed sensor 1 and outputs a drive control signal when the derived deceleration β is larger than a predetermined value α. Then, the first predetermined time T1 is measured by the first timer incorporated in the ECU 2, and
When the deceleration continues during the measurement of the first predetermined time T1 and the detected speed becomes lower than the predetermined speed, the second predetermined time T is set by the second timer built in the ECU 2.
2 is timed.

When a drive control signal from the ECU 2 is input to the hazard lamp drive device 3 which is the drive means 14, the alarm device 13 is activated by the hazard lamp drive device 3.
The hazard lamps 4 at the front and rear of the vehicle are designed to blink.

By the way, when the first timer finishes measuring the first predetermined time T1, or during the measurement of the first predetermined time T1, the second timer starts measuring the second predetermined time T2. When the time counting is finished or when the alarm release switch 21 as the alarm release means is turned on, E
The output of the drive control signal from the CU 2 to the hazard lamp drive device 3 is stopped.

A turn switch 22 for indicating a direction and an accelerator switch 23 which is turned on by depressing the accelerator are also used as the alarm canceling means 20, and these turn switch 22 or accelerator switch 23 are used.
When the switch is turned on, the output of the drive control signal from the ECU 2 to the hazard lamp drive device 3 is stopped.

Next, a series of control operations will be described with reference to the flowchart of FIG.

First, as shown in FIG. 3, a vehicle speed sensor 1,
The speed V of the vehicle is calculated by the ECU 2 (step S
1) The ECU 2 calculates the deceleration β, which is the reduction amount of the speed per unit time (step S2).
Is determined to be greater than the predetermined value α (step S3), and if the determination result is NO, the process returns to the start.

On the other hand, if the decision result in the step S3 is YES, the alarm release switch 21, the turn switch 22,
It is determined whether or not each switch of the accelerator switch 23 is off (step S4). If the determination result is NO, the process proceeds to step S10 described later, and the determination result is YES.
If so, the ECU 2 outputs a drive control signal to the hazard lamp drive device 3, the blinking of the hazard lamp 4 is started, and an alarm is issued to the following vehicle (step S
5) The first timer is set (step S6), and it is again determined whether or not the switches 21 to 23 are off (step S7). If the determination result is NO, the process proceeds to step S10.

If the decision result in the step S7 is YES, it is decided whether or not the first timer has finished measuring the first predetermined time T1 (step S8), and the decision result is YES. If there is, the first timer is reset (step S9), the output of the drive control signal from the ECU 2 is stopped, the blinking of the hazard lamp 4 is stopped (step S10), and then the process returns to the start.

Furthermore, if the decision result in the step S8 is NO, the speed V1 of the vehicle at that time is calculated (step S11), and it is judged whether or not the detected speed V1 is smaller than the predetermined speed V0. (Step S12) If the determination result is NO, the process proceeds to step S7, and if the determination result is YES, the first timer is reset and the second timer is set at the same time, and the second timer sets the second timer. Of the predetermined time T2 is started (step S1
3) Then, it is again determined whether or not the switches 21 to 23 are off (step S14), and the determination result is NO.
If so, the process proceeds to step S10, the blinking of the hazard lamp 4 is stopped, and if the determination result is YES, it is determined whether or not the second timer has finished counting the second predetermined time T2 ( Step S15).

Then, the determination result of step S15 is NO.
If so, the determination in step S15 is repeated until the determination result is YES, and if the determination result is YES, the second timer is reset (step S16), then the process proceeds to step S10, and the hazard lamp 4 Flashing stops.

Therefore, when the first and second timers 15 and 16 respectively finish measuring the first and second predetermined times, the alarm release switch 21 is operated, or the turn switch 22 or the accelerator switch 23 is turned on, the ECU 2 is activated. Since the output of the drive control signal of is stopped,
After a predetermined time from the start of the alarm or the turn switch,
As in the case of releasing the alarm when the accelerator switch is turned on, it is possible to prevent the alarm from being released even though deceleration is continuing, and also to release the alarm as appropriate in situations where it is determined that the alarm is not required. it can.

In the above embodiment, an alarm is issued not only for sudden deceleration due to brake braking but also for sudden deceleration due to an erroneous gear change operation.
It goes without saying that the alarm may be issued only for the sudden deceleration caused by the brake operation.

Further, it goes without saying that the alarm canceling means 20 may be any one of the above-mentioned switches 21 to 23.

Further, the alarm device and each means are not limited to those shown in FIG.

[0025]

As described above, according to the present invention, the driving from the control means is performed by the termination of the counting of the first and second predetermined times by the first and second timers or the operation of the alarm canceling means. Since the output of the control signal is stopped, it is possible to prevent the alarm from being released even though the deceleration is continuing as in the past, and an appropriate alarm is issued under the situation where it is judged that the alarm is not necessary. It can be canceled and the function can be improved.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing a relationship between each component of the present invention.

FIG. 2 is a block diagram of an embodiment of the present invention.

FIG. 3 is a flowchart for explaining the operation of one embodiment.

[Explanation of symbols]

 1 Vehicle speed sensor 2 ECU (control unit) 3 Hazard lamp drive device 4 Hazard lamp 21 Alarm release switch 22 Turn switch 23 Accelerator switch

Claims (4)

[Claims] 1. A vehicle speed detection means for detecting a vehicle speed, a deceleration calculation means for calculating a deceleration from a change in the speed detected by the vehicle speed detection means, and a drive control signal output when the deceleration is larger than a predetermined value. Control means for driving the alarm device by inputting the drive control signal, and a first predetermined time from the start of output of the drive control signal
And a second timer that starts counting a second predetermined time when deceleration continues during the time counting by the first timer and the speed detected by the vehicle speed detecting means becomes smaller than a predetermined speed. An alarm canceling means for canceling the driving of the alarm device, and the output of the drive control signal by the control means on condition that the timing of the timer is terminated or the alarm canceling means is operated. A rapid deceleration warning device for automobiles, which is characterized by stopping the vehicle. 2. The rapid deceleration warning device for an automobile according to claim 1, wherein the warning cancellation means is a warning cancellation switch. 3. The rapid deceleration warning device for an automobile according to claim 1, wherein the alarm canceling means is a turn switch for indicating a direction. 4. The rapid deceleration warning device for a vehicle according to claim 1, wherein the warning canceling means is an accelerator switch that is interlocked with depression of the accelerator.