| 摘要 |
<p>The present invention relates broadly to an irrigation system (10) comprising a surface wave launcher (12) located predominantly underground and controlled by an electronic control system (14), and a surface wave receiver (16) located underground and operatively coupled to an irrigation sprinkler (18A). In operation, the surface wave launcher (12) is activated by the electronic control system (14) to, under predetermined conditions, transmit a surface wave signal (20). The surface wave signal (20) is transmitted at a relatively low operating frequency and received by the surface wave receiver (16) to activate the irrigation sprinkler (18A).</p> |
