| 摘要 |
<p>An infra-red transmission system in which messages in the form of pulse coded data signals are transmitted between transmitting-receiving units (6) each being provided with at least one or a plurality of infra-red light emitting elements and one or a plurality of infra-red light sensitive photo-element, in a house having such a formed, common outlet and inlet opening for the infra-red light, that a directed transmitting and receiving beam is obtained. The message transmission is used for the control of carrier movements destined for the transport of goods along movements paths in an area, a plurality of transmitting-receiving units (6) being mounted on fixed locations along the movement paths and one transmitting-receiving unit (6) being mounted on each carrier (12) all having such an alignment of the transmitting-receiving beams that when a carrier passes said locations the relevant transmitting-receiving beams sweep across each other during which the message transmission takes place. In each carrier (12) which is freely controllable in direction and speed a data input- and display unit, connected to the associated transmitting-receiving unit, is mounted in aid of the driver.</p> |
