Vehicle warning system and warning control method

Abstract

The present invention provides a vehicle warning system and warning control method that, when the vehicle driver is in an abnormal state, can provide early notification of the abnormal state to the outside of the vehicle while delaying the timing that could cause distress to the driver, depending on the external environment of the vehicle. [Solution] The vehicle warning system 1 comprises an abnormality determination unit 20 that determines whether the driver is in an abnormal state, a warning generation unit 30 that generates a warning sound, and a warning control unit 20 that activates the warning generation unit 30 when the abnormality determination unit determines that the driver is in an abnormal state. The warning control unit 20 sets a delay time T from the time it determines that the driver is in an abnormal state until it activates the warning generation unit 30, according to the estimation result of the presence of a pedestrian. D Set it.

Claims

1. A vehicle warning system, An abnormality determination unit that determines whether or not the driver inside the vehicle is in an abnormal state, A warning generating unit that generates a warning sound directed at the outside of the vehicle, The system includes an alarm control unit that activates the alarm generation unit when the abnormality determination unit determines that the driver is in an abnormal state, The alarm control unit, Based on detection information from vehicle sensors that monitor the vehicle's status and / or the surrounding environment, it is estimated whether or not pedestrians are present around the vehicle. A vehicle warning system that sets a delay time from the moment the driver determines that an abnormal condition exists until the alarm generation unit is activated, based on the estimated result of the presence of the pedestrian.

2. The vehicle warning system according to claim 1, wherein the warning control unit sets the delay time when it is estimated that no pedestrian is present to be longer than the delay time when it is estimated that a pedestrian is present.

3. The vehicle sensor is a vehicle speed sensor that detects the speed of the vehicle, The alarm control unit, Based on the vehicle speed information from the vehicle speed sensor, the speed of the vehicle is acquired. The vehicle warning system according to claim 1, wherein it is presumed that no pedestrian is present when the speed of the vehicle is equal to or greater than a predetermined speed threshold, and it is presumed that a pedestrian is present when the speed of the vehicle is less than the predetermined speed threshold.

4. The aforementioned vehicle sensor is a navigation system, The alarm control unit, Based on the vehicle's location information from the navigation system, it is determined whether the vehicle is traveling on an expressway or a general road. The vehicle warning system according to claim 1, wherein it is determined that the vehicle is traveling on a highway, it is presumed that the pedestrian is not present, and it is determined that the vehicle is traveling on a general road, it is presumed that the pedestrian is present.

5. The vehicle sensor is an external camera that captures images of the outside of the vehicle. The alarm control unit, The vehicle warning system according to claim 1, which estimates whether or not a pedestrian is present outside the vehicle based on image information from the external camera.

6. The vehicle warning system according to claim 1, wherein the abnormality determination unit determines that the driver is in an abnormal state when the abnormal state continues for a predetermined time after an abnormal state of the driver is detected.

7. The vehicle warning system according to claim 6, wherein the warning control unit starts deceleration control to reduce the speed of the vehicle when the abnormality determination unit determines that the driver is in an abnormal state.

8. The vehicle alarm system according to claim 6, further comprising an in-vehicle notification unit that notifies the inside of the vehicle that an abnormal condition of the driver has been detected.

9. The vehicle alarm system according to claim 6, further comprising a cancellation unit that can be operated by the driver to cancel the detection of an abnormal state of the driver by the abnormality determination unit.

10. A warning control method for notifying the outside of the vehicle by an alarm sound that the driver of the vehicle is in an abnormal state, The abnormality detection unit of the vehicle determines whether the driver is in an abnormal state or not, Based on detection information from vehicle sensors that monitor the vehicle's condition and / or the surrounding environment, it is estimated whether or not pedestrians are present around the vehicle. Based on the estimated result regarding the presence of the pedestrian, a delay time is set from the time the driver determines that an abnormal condition exists until the alarm sound is emitted. An alarm control method comprising: activating an alarm generating unit to generate an alarm sound after the delay time has elapsed, if the driver is determined to be in an abnormal state.

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