Driving Control and Safety Products Driving Assist System

By monitoring driving conditions such as road conditions, driver input and the state of the vehicle, sensing technology contributes to advanced automated driving technology. For example, it supports advanced safety systems such as adaptive cruise control systems that maintain a constant distance from the preceding automobile, collision avoidance assist systems that predict collisions with automobiles and objects ahead and brake the vehicle accordingly, and lane keeping assist systems that recognize white lines and help drivers stay in the middle of the lane. 

Components

Millimeter-Wave Radar Sensor


The Millimeter-Wave Radar Sensor measures the relative speed of and distance to vehicles and other objects ahead. Based on measurements from this sensor, the pre-crash safety system informs the driver of a possible collision, tightens the seatbelts to protect the occupants, applies additional pressure to the brakes, and activates other driving assist systems to minimize damage in the event of a collision.

Laser Radar Sensor

Vision Sensor

Using an imaging camera, the Vision Sensor detects white road lane markings and objects on the road. Based on information received from the Vision Sensor, safety systems activate and the Lane Keeping Assist System alerts the driver (who may be falling asleep or looking away from the road) when it detects that the vehicle is about to cross a lane boundary.

Driving Assist Electronic Control Unit

The Driving Assist Electronic Control Unit is a computer that constitutes a part of a Vehicle Safety System. This unit measures the distance to an obstacle on the road and determines whether the vehicle is traveling between the lanes based on a wide range of information provided by sensors that monitor the surroundings of the vehicle, such as a Vision Sensor and Millimeter-Wave Radar Sensor. Based on information from this unit, the Vehicle Safety System automatically detects an imminent collision to prevent an accident or reduce the severity of a crash.

Sonar Sensor

Installed inside the bumpers, the Sonar Sensor uses ultrasound to measure the distance to obstacles near the vehicle. A Perimeter Monitoring System with this type of Sensor alerts the driver with an audio (voice or alarm sound) or visual warning when the vehicle is close to an obstacle. This is a useful safety system for avoiding collisions with objects in blind spots while reversing or parking the vehicle.

Seatbelt ECU

Seatbelts are usually tightened to hold occupants in their seats during a collision. The Seatbelt Electronic Control Unit is a computer that increases the tension of the seatbelts immediately before a collision. When the Driving Assist Electronic Control Unit judges that a collision is inevitable, based on information supplied by the Millimeter-Wave Radar Sensor and other systems, it instructs the Seatbelt Electronic Control Unit to tighten the seatbelts.

Driver Status Monitor


The Driver Status Monitor uses an ECU and camera to analyze the driver's face and eyes and determine where he/she is looking. If the driver faces away from the road or closes his/her eyes for a certain period of time, an alarm warns the driver to encourage safer driving.