| 摘要 |
<p>The invention relates to a protecting and warning barrier for long perimeters, meant to watch and guard open spaces of large dimensions, situated under the direct influence of the environment and meteo factors and wherethrough there may also accidentally pass flying birds or other small animals. According to the invention, the protecting and warning barrier for long perimeters consists of a number (n) of channels consisting of the same number of pairs of infrared radiation emitters (L) and sensors (S), built-in a radiation-emitting block system (E) and a transmitting receiver (RT), which controlls the simultaneous interruption of a number (m) of channels smaller than or equal to the total number (m) of channels, in an m<n relation, in a pre-established and high enough time interval (delta t), necessary for a person to pass through the barrier, though a complex logical circuit (CLC), condition which determines that a frequency modulated warning signal be input into a central warning unit (UCA), through a supply network (RST).</p> |
