JPH0725301A - Hand-off driving detecting and warning device - Google Patents

Abstract

PURPOSE:To detect hand-off driving and give warning to the occupant of an automobile so as to prevent the generation of an accident. CONSTITUTION:A hand-off driving detecting-warning device is provided with a vehicle speed sensor 1 for detecting the vehicle speed, a steering force sensor 2 for detecting steering force, a judging means 3 for judging whether the state of the vehicle speed being the specified value or more and the steering force being in a specified micro range has continued for the specified time or more, and a warning device 4 for sending out a warning to hands-off driving detected upon judging the continuation of the above-mentioned state for the specified time or more.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for detecting an occupant of a vehicle and alerting the occupant of this.

[0002]

2. Description of the Related Art In recent years, a power steering device has been widely used as a steering device for an automobile in order to reduce a steering force of a driver. For example, in a vehicle speed sensitive power steering device, as shown in FIG. 4, a necessary steering force is controlled by a voltage according to the vehicle speed so that a light force can be steered at a low speed and a heavy steering force is required at a high speed. is doing.

[0003]

As described above, although the power steering device improves the steering performance of the automobile and is convenient for the driver, it is not preferable to perform so-called hand-over driving in which the steering handle is released. . Therefore, an object of the present invention is to provide a hand-released driving detection and warning device capable of detecting a hand-released driving and warning the occupant (driver or fellow passenger) of the vehicle of this.

[0004]

SUMMARY OF THE INVENTION A hand-over driving detection and warning device according to the present invention comprises a vehicle speed sensor for detecting a vehicle speed, a steering force sensor for detecting a steering force, a vehicle speed of a predetermined value or more, and a predetermined steering force. And a warning device that issues a warning when it is determined that the state has continued for a predetermined time or longer, and a warning device that determines whether the state within the minute range has continued for a predetermined time or longer. To do.

[0005]

When the driver's hand is far from the steering wheel, the steering force applied to the steering device is very small. The driver's hand often leaves the steering wheel for a short period of time while driving a vehicle, but in the case of part-time driving, this continues for a long time. Therefore, basically, when the state where the steering force is in the minute range continues for a predetermined time or longer, it is determined that the driver is in the hand-released operation, and the occupant should hold the steering wheel with his / her hand in order to prevent an accident from occurring. Warning. However, if the vehicle speed is lower than a predetermined value, such as several km / h, it is not regarded as the hand-over driving.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a configuration example of a hand-over driving detection and warning device, which is composed of a vehicle speed sensor 1, a steering force sensor 2, a determination device 3 and a warning device 4.

The vehicle speed sensor 1 detects the vehicle speed of an automobile and gives its output to the judging device 3. The steering force sensor 2 detects a force applied to the steering wheel, that is, a steering force, and outputs its output to the determination device 3. The determination device 3 determines whether or not the state in which the vehicle speed is a predetermined value, for example, 5 km / h or more and the steering force is in a minute range, for example, 0.3 kgf or less, continues for a predetermined time, for example, 5 seconds or more. If it continues for more than a predetermined time, it is considered as a part-time operation. The warning device 4 issues a warning when it is considered to be a part-time driving, and for example, a buzzer, a chime, a synthetic sound, a display, a blinking of a lamp, etc. are used.

The determination device 3 can be realized by an electronic control unit using a microcomputer used for steering control or engine control of a vehicle. In this case, the determination is performed by the control flow as shown in FIG. 2, for example. That is, input of vehicle speed (step S1),
Following the input of the steering force (step S2), the determination by the hand-release driving determination program (step S3) is performed.

FIG. 3 shows an example of the determination flow by the hand-released operation determination program. In the determination flow of FIG. 3, it is determined in step S31 whether the vehicle speed is 5 km / h or more and 5 km / h.
If h or more, it is determined in step S32 whether or not the steering force is 0.3 kgf or less, and if 0.3 kgf or less, step S
One pulse is given to the counter at 33 to accumulate the duration as unit time. Next, in step S34, it is determined whether or not the time accumulated by the counter, that is, the duration is 5 seconds or more. If it is 5 seconds or more, it is a hand-over operation, and a warning is issued to the warning device 4 in step S35. .

If the duration is less than 5 seconds in step S34, the process returns to step S31 and the determination of the vehicle speed and the determination of the steering force are repeated. If the vehicle speed is less than 5 km / h in step S31, the counter is reset in step S36, and the determination of the hand-over driving is performed again from the beginning. Similarly, if the steering force exceeds 0.3 kgf in step S32, the counter is reset in step S37 and the hand-released operation is determined again from the beginning.

[0011]

As described above, according to the present invention, it is possible to detect a hand-over driving and give a warning to the driver or passenger. Therefore,
It is possible to prevent accidents caused by the driver's hand leaving the steering wheel due to a drowsy driving, a look-aside driving, or an operation of a stereo device.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is a diagram showing an example of a control flow.

FIG. 3 is a diagram showing an example of a flow of hand-held driving determination.

FIG. 4 is a diagram showing a characteristic example of a vehicle speed-sensitive power steering device.

[Explanation of Codes] 1 Vehicle speed sensor 2 Steering force sensor 3 Judgment device 4 Warning device

Claims (1)

[Claims] 1. A vehicle speed sensor for detecting a vehicle speed, a steering force sensor for detecting a steering force, and whether or not the vehicle speed is equal to or higher than a predetermined value and the steering force is within a predetermined minute range for a predetermined time or longer. A hand-released operation detection and warning device, comprising: a judgment device for judging whether or not it is present, and a warning device for issuing a warning when it is judged that the state has continued for a predetermined time or longer.