In-vehicle hazard warning device

In-vehicle warning device that detects drowsy driving risk based on the blood flow velocity ratio between two sites

This technology is an in-vehicle hazard warning system consisting of a terminal unit that senses blood flow velocity via patches attached to the common carotid artery and the vertebral artery to calculate a risk index for determining the driver's sleep state, and a warning unit that generates alerts when a risk is detected.

Existing drowsy driving warning methods rely on external signals such as facial expressions or blinking, which often lead to malfunctions and make it difficult to provide tiered warnings based on physiological signals like cerebral blood flow changes.

By calculating a risk index based on the ratio of the two blood flow velocities and generating tiered warning signals according to the range of the risk index, this technology can be applied to in-vehicle driver monitoring systems to provide proactive, staged warnings for drowsy driving risks.

‍

‍

Key Features:

• A patch unit consisting of a first patch attached to the user's common carotid artery to sense blood flow velocity and a second patch attached to the vertebral artery to sense blood flow velocity.
• A terminal unit that calculates a risk index using the first and second blood flow velocities and generates a warning signal if the index falls within a preset risk range.
• A warning unit that generates a warning control command to alert the user upon receiving a warning signal from the terminal unit.
• A risk index calculation module that determines the risk index based on the ratio of the first blood flow velocity to the second (or vice versa), and a warning signal generation module that produces tiered alerts for each risk range.

‍