Vehicle wheel safety barrier system using pressure and infrared sensors

摘要

The safety barrier system prevents a person from being caught under a wheel of a vehicle and is provided with a sensing system to inform the driver of the presence of the person on the barrier during start up. The sensing system combines a first sensor (for example, a pressure sensor) with an infrared sensor, and includes a snow switch for selectively using the first sensor and/or the infrared sensor depending on the weather conditions. The barrier is mounted to the vehicle by a motor drive mechanism to lower the barrier when stopped and to raise the barrier after the vehicle has travelled a given distance. The system is particularly suitable for school buses.