发明名称 |
TWO-WIRE POWER AND COMMUNICATIONS FOR IRRIGATION SYSTEMS |
摘要 |
<p>A large number of irrigation system devices connected to a common two-wire cable can be powered and individually controlled from a central location by transmitting over the cable DC pulses of alternating polarity. Control information is conveyed by transmitting a command pulse train consisting of a series of pulses, separated by short no-power intervals, whose polarities indicate logic ones or zeros. Following a command pulse train, a selected watering station decoder acknowledges receipt of instructions by drawing current during a predetermined pulse of an alternating-polarity power pulse cycle, while a sensor decoder returns binary data by drawing current during one or the other of the alternating-polarity pulses of a series of power pulse cycles.</p> |
申请公布号 |
EP1769192(A2) |
申请公布日期 |
2007.04.04 |
申请号 |
EP20050754670 |
申请日期 |
2005.05.25 |
申请人 |
THE TORO COMPANY |
发明人 |
GARDNER, RANDALL, JAMES;HEINE, MICHAEL, D.;DALMAN, JOHN, C. |
分类号 |
F17D3/01;A61N1/08;E03B7/07;G05B11/26;G05D7/06;H04B3/54;H04L12/10;H04L29/08 |
主分类号 |
F17D3/01 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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