Method and apparatus for catching infrared rays in on-vehicle signal transmission system using infrared rays

摘要

In the method and apparatus, a light receiving element 1 is prevented from being exposed to the direct light of the sun so that a signal is transmitted by means of infrared rays in a favorable and steady manner. a transmitter 4 carried by a driver emits the infrared rays 6, 7 toward a floor surface of the vehicle. The light receiving element 1 is oppositely disposed from such floor surface to receive a reflected component of the infrared rays 6, 7. The apparatus comprises: the transmitter 4, which is carried by the driver and provided with a light emitting element 5 for emitting the infrared rays 6, 7 toward the floor surface; and, a receiver 3 installed in a front panel of the vehicle, in which receiver 3 the light receiving element 1 is mounted.