TWO-WIRE POWER AND COMMUNICATIONS FOR IRRIGATION SYSTEMS
摘要
A large number of irrigation system devices connected to a common two-wire cafe can be powered and individually controlled from a central location by transmitting over the cafe 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.
申请公布号
WO2005118059(A2)
申请公布日期
2005.12.15
申请号
WO2005US18957
申请日期
2005.05.25
申请人
THE TORO COMPANY;GARDNER, RANDALL, JAMES;HEINE, MICHAEL, D.;DALMAN, JOHN, C.
发明人
GARDNER, RANDALL, JAMES;HEINE, MICHAEL, D.;DALMAN, JOHN, C.