MR. DAVID DWYNN ANDERSON, PT
Physical Therapy at Millenium Way, Meridian, ID
License number
Idaho PT-612
Category
Restorative Service Providers
Type
Physical Therapist
Address
Address
1618 S Millenium Way SUITE 210, Meridian, ID 83642
Phone
(208) 884-4647
(208) 884-8984 (Fax)
(208) 884-8984 (Fax)
Professional information
David Dwynn Anderson, Meridian ID
Specialties:
Physical Therapist
Address:
1618 S Millenium Way, Meridian, ID 83642
Subterranean Two-Wire Power And Communications Network
US Patent:
2004008, May 6, 2004
Filed:
Oct 16, 2003
Appl. No.:
10/688190
Inventors:
Scott Anderson - Meridian ID, US
David Anderson - Meridian ID, US
David Anderson - Meridian ID, US
International Classification:
H04B003/00, H04L025/00
US Classification:
375/257000
Abstract:
A combination of frequency and time division multiplexed signals communicates using bursts of higher frequency sinusoidal waves superimposed upon the alternating current in a two-wire power distribution network. A synchronization pattern precedes data, all bursts having the same frequency to overcome problems caused by varying reactances, and all bursts being confined within negative half-cycles of the AC power. Such networks minimize the amount of wire needed to connect large numbers of devices to a common controller while covering large distances, and requiring no particular connection pattern or terminations, whether near the surface, above ground, or in deep earth wells. In an irrigation system they accommodate at once solenoid valves and distributed environmental sensors. Landscape changes that would otherwise require new wiring to accommodate new irrigation zones are facilitated by merely tapping into the two-wire communications lines at the nearest accessible point. Outdoor lighting controls and security sensors are easily accommodated.